Side-by-side comparison of BuckyDrop, Supplyia, Superbuy, CSSBuy and Oopbuy: service fee structure, published free storage days, photo fees, and which order size each one suits. Where an agent does not publish a number — CSSBuy’s service fee on 1688, for one — we say so instead of printing one. Read alongside the extension’s own figures; last checked 2026-10-03.
1. Service fee: four of the five charge 0% on 1688
Four of the five platforms charge 0% on 1688: BuckyDrop, Superbuy, Oopbuy and CSSBuy. BuckyDrop adds a flat ¥9.9 order-fulfilment fee per parcel — that is its entire take on a standard 1688 order. Superbuy and Oopbuy add nothing. Supplyia is the only percentage-based agent: an 11-rung ladder that starts at 10% (under $500) and slides to 5% above $30,000, with a platform minimum that floors small orders. CSSBuy documentation contradicts itself on whether 1688 carries a service fee, so the extension shows its fee as unconfirmed rather than picking a number. A $400 order therefore costs about ¥9.9 at BuckyDrop, nothing at Superbuy and Oopbuy, and $40 at Supplyia on the first rung. The ladder only starts rewarding you past $30,000 — below that, the flat and zero-fee agents win.
Free storage: 30 days at one end, 90 at the other
Superbuy, CSSBuy and Oopbuy each publish 90 days of free storage, and BuckyDrop publishes 30. Where they genuinely diverge is what happens afterwards, which is also where comparison tables usually stop. Superbuy charges around ¥0.1 per item per day once the window closes. CSSBuy charges roughly ¥15 per ID per month. Supplyia prices storage by volume instead of time — a limited free allowance, then around $5 per cubic metre per month. Those three units do not convert into each other cleanly, so translate each into your own parcel before drawing a conclusion: a long headline window with a steep per-ID charge can easily cost more than a short one billed cheaply per day. If your stock sits for weeks, this line matters more than the service fee ever will.
3. Photo / QC fees: ¥0 vs ¥2
Photo QC is billed per item. Supplyia and Oopbuy include the standard inspection free. CSSBuy charges ¥1.5 per item. BuckyDrop and Superbuy charge ¥2 per item for a standard photo set — verified against their official fee pages, 2026-09. The ¥5–¥15 tiers you see quoted elsewhere are the premium services (model try-on, video, multi-angle detail shoots) that most dropshippers never need. Full QC — colour, size and defect scan — sits above the standard tier on every platform. Dropshipping blind saves you time but accepts a 5–15% defect rate on cheap goods.
What we will not put a number on
Most tables like this one carry a row labelled support: response time, languages covered, hours of operation. We removed ours, and it is worth explaining why. Every figure we had was somebody’s impression of talking to support. You cannot measure another company’s reply queue from the outside, and one conversation proves nothing either way. The same reasoning applies to the claims you will read elsewhere about which agent files EU importer-of-record paperwork or holds stock in a particular overseas warehouse — those arrangements change without any public changelog, and no platform publishes a page we can cite for them. Here is what we would do instead, and it takes two minutes: open each site you are considering, start a chat, ask the one question your order actually turns on — will you carry this item class to this destination, and is that line duty-prepaid — and judge them on the answer. Then compare the parts that are published and therefore checkable: the fee structure, the storage overage, and the line list for your parcel.
5. Counter-intuitive: cheapest fee is not always best
A new buyer looks at the fee ladder, sees Supplyia at 5%, picks it, and ships $200 of goods. The 5% rate does not apply — a $200 order sits on the 10% rung (under $500). Real fee: $20, and the platform minimum can floor it higher. The same goods via BuckyDrop: a flat ¥9.9 order fulfilment fee, no percentage at all. Via Superbuy or Oopbuy: no service fee either. This is the counter-intuitive part — once four of the five charge nothing on 1688, the platform with the best headline percentage is the only one actually charging a percentage at all. The discount tiers only start helping Supplyia at $500, $1k, $3k. If you are not sourcing at those volumes, a flat-fee agent like BuckyDrop or a zero-fee agent like Superbuy is simpler and cheaper.
FAQ
Which of the 5 agents is cheapest for a $500 order?
For a $500 single order, four of the five charge no service fee at all — BuckyDrop (¥9.9 fulfilment only), Superbuy and Oopbuy (nothing, plus domestic and shipping). Supplyia charges $50 on its first rung (10%, under $500) and only steps down to 5% above $30,000; its platform minimum can also apply on small orders. CSSBuy documentation conflicts on 1688 fees, so we show the fee as unconfirmed rather than quoting a number. On a $500 order the real differentiator is the shipping line, not the headline fee — run your actual weight and destination through the extension, because the cheapest agent flips between small parcels and bulky ones.
Can mainland China users access the extension?
Yes. 1688CMP works on any Chrome browser and on any 1688 product page regardless of where you browse from. If you are inside mainland China, the extension shows quotes in ¥ (CNY). If you are overseas, it shows USD by default. The extension itself does not access 1688 login — you browse as a normal visitor. For browsing comfort, you may want a Chrome translation plugin if you do not read Chinese — the 1688 product pages themselves are mostly Chinese.
Do you store any user data?
No. Everything happens in your browser: the extension reads the product page, calculates locally, and draws the comparison bar. The manifest asks for four permissions — storage, to remember which agents you left enabled and which language you prefer; activeTab and scripting, to place the bar into the 1688 tab you are looking at; and tabs, to open an agent link in a new tab. On top of that it declares host access for three 1688.com hosts and nothing else, plus the two public translation endpoints used by the one translate button, which only fires when you press it. No backend talks to us because we do not run one. The longer write-up is at /privacy.
What if an agent changes its fee?
It does not check automatically, and we would rather tell you that than let you assume it does. The fee tables and shipping rates are bundled inside the extension, so they change when you install an update and not before — there is nothing phoning home to the agents every night. What we do instead is date things: every article carries a last-checked line, and the comparison bar reflects that same snapshot. So the habit worth forming is reading the agent’s own fee page before you commit real money, particularly on anything large. Where we could not reproduce a figure from something the agent publishes, we either marked it unconfirmed or took the agent out of the comparison altogether — the second of which has happened twice.
How do I switch between 5 agents?
From the popup there is one toggle per agent, five in total, all on by default. Switch off anyone you do not want quoted and the bar on the product page will only price the ones you left enabled. The choice is saved through Chrome storage, so it follows you to other devices if you are signed into Chrome, and it is erased when you uninstall. It is never uploaded anywhere, because there is no server to upload it to.