This right here. Honestly the fees don't bug me all that much since 10% is relatively standard. But I'll never sell a high dollar book on eBay as long as their current policy of "Buyer first, buyer second, buyer third. What sellers?" still exists. There's too many horror stories about successful eBay return scams floating around out there. I've personally never experienced one, but even with the relatively lower dollar books I sell, I'm still anticipating one day getting a complaint about a scratched case and then receiving a phone book from Boise, ID in return.
The good stuff always gets consigned to a trusted third party.