[quote name='blue' timestamp='1452858406' post='2954119']
Yeah, maybe the seller was super hurting for cash and sold to whoever got the cash in his hands first.
[/quote]
Regardless of that, the seller should make the buyer (in this case Twincam) aware that there is someone else who has got there first. It's common courtesy.
It's really just a case of an inconsiderate seller wasting someones time which [u]can[/u] [u]easily[/u] be avoided just by adding into one of the (seemingly many) e-mails that he has another prospective buyer.