It's the SELLERS responsibility to list all fees upfront. Since you have already paid half the fee I would leave it at that, if the seller refuses then I would contact Audiogon.
Seller asked for PayPal fees after the sale. Should I pay them or not?
I recently purchased an item and after accepting my offer the seller asked for PayPal fees (3%). I checked the listing and nothing was listed in the ad about my paying the fees. I have already payed half the fee but I'm not sure if I should have paid the full amount. Changing the deal after accepting the offer feels wrong to me. Looking for guidance.