[Ebay] Improve return policy for items returned due to buyer's remorse

In the last 3 months beginning in January I have had a lot of returns for some strange reason? When they return the item, most of them are putting for a reason: changed mind or something like that. I have not had people returning anything because there is anything wrong with it. But it's just weird. I've never had this happen so many times in the span of 3 months. For a couple of those months, I also had about 5 people from France bid up some items really high and then they just never paid. I finally had to put that I only sell to the US and had to block anyone from Europe from bidding to stop that. Recently, I had a guy return a celebrity photo he got, which he bid up to 300.00. He started the return before I even sent it out stating "I overspent this month and I need a refund." So I unfortunately paid the postage through eBay before I even got the message. So I just refunded the money. But of course, now I'm out the postage fee. The same person just sent me a message today on another photo he bought for 20.00. He got that one and put "changed mind" as the reason. I don't know if he just thinks I'll just refund it without having him return it or what? But he's going to have to return it because I can't keep eating all these return costs. Since this is the second time he's done this, I put a block in him bidding on anything else. But this whole return thing because of basically buyers remorse is getting out of hand. I remember the days when eBay told people "bidding is not a game. Don't bid if you don't intend to buy." I also recall how eBay would ban a person if they bid on stuff 3 times and didn't pay. But unfortunately that's no longer the case. I am saying all this because I was wondering if anyone else is having this problem? I know times are tough and everyone is worried about the economy and everything but I've just never had this happen so much until recently.😮‍💨