I feel like this would be an accounting headache for me, though eBay don't make it 100% clear how it works for sellers on managed payments (you have to sign up, then get the contract for that).
For non-MP sellers, the buyer pays the discounted amount, the seller receives the full amount, and then owes eBay the discount. This suggests that you pay FVF on the full price, not the discounted price, as well as fund the majority of the discount, which is bad enough (IMO), since if you run your own sale, you only pay FVF on the price the buyer pays.
But further to that... what of GST obligations, for sellers that have them? I have a habit of overthinking things when the answer is simple so if anyone can put this is proper context etc I'd be very grateful, but since that technically means two separate parties have paid differing amounts for the goods, what is the GST payable (by the seller) on the order, what do you put on the tax invoice for the buyer when you receive the full amount for the goods, but they pay a discounted amount, and you later [technically] pay the discount as an extra fee rather than a partial refund of item price? ๐ฑ
