Well, this is more of a rant but also looking for advice on how you guys would have dealt with this situation just for my own future reference. So, I do a lot of buying/selling on Craigslist. I buy car parts, fix them up/refurbish them as a side hobby, and sell them. An opportunity raised to pick up a F20c1, ( Honda s2000), shortblock for a good price. I bought it, the seller was a trusted guy on the s2000 forums and during the buying process he didn't give me any reason to doubt him. Although, idiot me, I didn't thoroughly check out the block. I was going to use the block for my own personal s2000 build, but after some financial issues came up, and the block sitting there for a month or two without me having any plan for its use, I decided to part with it. I put it up on CL for 400 bucks, to me a great price for a f20c1 shortblock with crank, rods, and pistons. Naturally it sold pretty quickly. A week later, the buyer contacts me saying he tried to use the block and it has a spun rod bearing. Now, I strive to be fair in all my dealings and I hate to think that I unintentionally sold someone a bad part, granted, he can still use the block, just not the crank. However, even though technically I have no obligation to do anything, I offered to refund half of the cost. He tried to push the issue and try to get me to refund him all of it, I said fine but give me the block back, then he backed off and said he's fine with just half refund. After that phone conversation, I feel like I just got majorly played. I already agreed to refund him, but technically there's no proof of anything and I have no obligation to really do anything. Although I'm not trying to ruin my reputation by being known to sell shitty parts. I'm just kind of wondering how some of you with more experience would have handled a situation like that. I tried to do what I felt was right, and I felt that he was just trying to take advantage of me. Oh well, at least I have nothing on my conscience. Sorry for the long post/rant, just kind of got me thinking.