Own store vs. marketplace: the real tradeoff
A marketplace hands you traffic and trust on day one but rents you the customer. Your own store gives you the margin and the relationship but makes you buy every visit.
The real question isn't which is better. It's which cost you'd rather pay.
Fastest path: one prompt, end to end
🤖 AI prompt — paste into ChatGPT / Claude
You are an e-commerce economics analyst. Use MY numbers only.
[my product]: [what it is]
[my margin]: [contribution margin % at full price]
[my target buyer]: [who + how they find products today]
Rough monthly orders now or expected: [#]
Marketplace I'd consider: [Amazon / Etsy / eBay / other]
Do this:
1. Build a side-by-side of unit economics on the marketplace vs my own store: marketplace referral/selling fee vs store platform + payment + ad cost to acquire one order. Use realistic fee ranges and label each assumption.
2. Show who owns the customer in each: email/contact, repeat-purchase control, review ownership, data.
3. State the honest tradeoff: built-in traffic and trust (marketplace) vs margin and customer ownership (store), and which fits MY margin and buyer.
4. Recommend a starting mix (e.g. marketplace to validate demand, store to own repeat buyers) with a trigger for adding the second.
Do not invent fee percentages. If you can browse, read the platform's current fee page; if not, mark the fee 'confirm' and tell me where to check.
Output: fee-math table + who-owns-customer table + the tradeoff + a starting recommendation.
Or do it in 3 steps
- Do the fee math on one order. A marketplace typically skims a referral fee off every sale plus fulfillment. Your own store charges a platform fee and payment processing, but its real cost is the ad spend to get the visit. Put both on one order at your price and see which leaves more margin, at your actual volume.
- Ask who owns the customer. On a marketplace the buyer is the platform's: you often don't get their email, the review lives on the listing, and the reorder can go to a competitor's ad. On your store the email, the data, and the repeat purchase are yours. That ownership is the asset you're paying the marketplace to give up.
- Pick the cost you can afford now. Thin margin and no audience? The marketplace's built-in traffic is worth the cut while you validate. Healthy margin and a brand people reorder? Your own store's ownership compounds. Most sellers end up on both, starting where the immediate cost is survivable.
Worked example (labeled): a $40 skincare product at 65% margin.
On a marketplace, a roughly 15% referral fee plus fulfillment leaves about half the margin, but orders arrive with zero ad spend from day one. On the own store, you keep the full 65% minus about 3% payments and a platform fee, but each first order costs, say, $12 of ads to acquire.
For a repeat-purchase product the store wins by order two, because reorders are free and the customer is yours. A one-time novelty item would favor the marketplace's free traffic. Match the choice to whether people come back.
Traffic you rent vs. customers you own is the whole decision; run the fee math at your real volume and pick the cost you can carry.