I'm looking for public opinion on this because apparently, someone traded me a "quicksell" unusual. Then, after the trade was done, he/she added me as a friend. Shortly after that, the person asked me for MORE keys than what was advertised in his/her post, claiming that he/she "misread the value" of unusual that was traded. Here are a few questions I asked myself in this situation:

Is the trader being disrespectful by asking for more than what was advertised in the trade post?

Is the trader being greedy, knowing as a fact that the trader deals with a large amount of quickselling?

Is the trader being rude by adding me as a friend, only to ask me for more keys?

Even though he/she is reputable based on trading history, would asking for more be considered wrong or potentially a scam?

I don't know exactly, and it was a weird situation for me to be in since I haven't done much trading along the lines of "quicksells." After taking screenshots of the completed trade as evidence and proceeding to block the trader in question, I really hope he/she doesn't try to ruin my reputation as a buyer.

Please discuss...