Total CRAP on their part.
I had some dumb ass bid a $1 on a domain I was selling with a min bid acceptable bid of $30 and then demanded I give him the domain – when I politely told him there was a min. he gave me a bad rep – same kind of dipstick behaviour
I think you were way too patient.
I also don’t sell links – it’s too easy for some asscracker to negotiate the price as low as he could get with confusing changes and misquotes – and then mess around paying