Facebook Is A Cesspool

Bought a laptop had drive Friday. Emailed the guy through the relay and gave my cell and asked him to text me if he had any left (4) he texted me right back and said yes. Said I'd take 2 and can meet him up at a public place. Xy Starbucks with a red hat on. Sure, 15 minutes. Went there, handed me the drives , handed him the cash and bought a coffee to go. No drama. Sold a 340 short block for 800 at end of a Mopar car show. Guy asked of I could drop it off at his place on way home and he would pay me then. I said sure as I didn't have any offers on it. I get there and the guy says could only get $600. I was pissed...it'll be cash before delivery next time. Aw, just buy parts at the swap meet like the goold 'ol days....