Reply to @jonbaas: They actually do now in very specific cases and I think the ToS has been updated to reflect it. However, I don’t think they do it often or for low amounts. I’ll see if I can find the part in the ToS that changed.
Here it is and it’s probably a death knell for the buyer if they request it without very good reason, but they do now agree to hear the case if someone insists:
“Deposit refunds, when available from the payment provider, can be performed by our Customer Support team. To prevent fraud and abuse, we limit the total amount of times users can request a payment provider refund from their account which is subject to review by our Customer Support team. Such refunds may be subject to an additional fee. If any processing fees were added at the time of purchase to create a new order, the processing fees from that payment will be refunded along with your deposit.”