I'd like to see pics of the jams. That may open the door up to the possibility of taking the gun back, or maybe it doesn't (that's obviously your call) but I'd like to see it.

I wouldn’t bother responding.

I have the same policy as most big online dealers - ie inspect before taking possession at the transfer FFL, but after doing the paperwork / transfer from the local FFL, it’s yours.

1. I can’t shoot this gun any better than the last 10.
2. I just got a hardon for something else.
3. Please take back this now used gun for what I paid for it so I can get something else.
4. I couldn’t really afford it to begin with.
5. I’m a pussy.

That about sums him up. Blocked and forgotten

Tell him "learn how to shoot".

Smells like a scam. I had something similar happen with a Bose Wave radio I sold on eBay, it worked perfectly but like 3 weeks later I get an message saying "it's all crackly and not working" and "I want my money back."

Yeah right. I ignored them.

I had the same issue with selling some fishing reels on ebay, they became parts doners, ebay forced to give them a refund I got the reels back, didnt matter that I stated no refunds.

buyers remorse or the guy is new to guns. ignore him.

Whenever anyone buys a used item from an individual they’re taking a risk that it may be defective or that the seller lied about an item’s condition. All you can do is educate yourself and then roll the dice and sometimes you just sadly regret buying something but too bad, you’re stuck with it. I fully understand and accept this when I buy used things. If other people don’t know this they need to learn. I wouldn’t bother with responding.