This has to be one of the worst posts that I've seen from a moral point of view.
''I also payed the Real Estate agent some cash on the side (~$5k) for him to convince his vendors to accept my offer.''
''I have used this every time I have purchased my principal place of residence. It has worked 3 out of 4 times.''
If this is factual then the poster should be reported to the cops to investigate the transactions in order to prosecute those involved and to hopefully compensate the victims.