Losing 4k ped can be a big deal. At least for some of us. And many times in the past, unintended trades like this one has been solved when the attention has come to the unintended buyer.I did bid on it because i think Lazz should never make this pathetic tread.
I think writing "expect same amount of empathy from me as you would get from a trade terminal" would suffice. Or, maybe even less as even MA occasionally returns items that has been dropped in trade terminal by mistake (nowdays for a fee).
If you take your reasoning one step further, then LAZZ wouldn't have to return anything. He could have said he thought it was a gift. But, he wants to keep his reputation in terms of promises and morailty high and upon returning the item he made the mistake of returning it to wrong person. And that wrong person, instead of returning it decided to make money from it. (And at this time, that wrong person should be aware of what happened - that the amp wasn't supposed to be a random gift.)
I also see that you didn't bid only once - to kind'a prove your point - you've overbid pretty much all bids previously posted (and even raised with 1k ped).