I will describe the cost structure for the 3 major marketplaces: GoDaddy (including Afternic), Flippa and Sedo.
1. Listing fees
BIN (Buy now) or Make offer listings are free on GoDaddy, Flippa or Sedo. However, auctions are free on GoDaddy, but cost $9 on Flippa and $59 on Sedo.
2. Advertising fees
Here come all sorts of upgrades to your listings for improved visibility, showcasing etc. that marketplaces offer. Usually there is not much sense in using them, unless you know exactly what you are doing. Can be selected during the process of listing a domain, or sometimes after the listing is live.
3. Successful sale fees
Godaddy: 20% (minimum $15) for a sale under $5000, and a bit less for a sale over that amount.
Flippa: 10% (no minimum obligatory fee, which is very good for those smaller $xx sales)
Sedo: 15% (minimum $60) - or, if your domain is parked with them, then 10% (minimum $60)
4. Transaction safety fees
All three marketplaces use their own Escrow services that are free for domains sold on the marketplace. Namely, Flippa Escrow service is pretty good and safe. However, if the buyer or the seller prefers for some reason to use the external service Escrow.com, it can be arranged too. There is a fee caclulator on the Escrow.com homepage. These fees can be paid by either the buyer, the seller, or split - whichever way they agree.
5. Disbrusement fees
These fees need to be considered when you chose the method for the marketplace Escrow service to pay you.
- Paypal: the usual 3% that Paypal charges any commercial transfer
- ACH or eCheck: usually free, at worse $5 or something minimal, depending on your location
- International bank wire: Payment from Flippa Escrow by bank wire can cost up to $50, depending on your location and your bank policy. (Note: you can choose to be paid by Flippa Escrow in Paypal, not to be confused with being paid by the buyer in Paypal). I have heard that Sedo sends bank wires for free (this is why they charge the minimum $60 successful sale fee). I do not remenber how much Godaddy charges, but I think they do charge. Payment from Escrow.com by bank wire should be around $25.