legal Beware: member "blue777" Non paying buyer

[DomainMagnate]

blue777 made an offer on one of my domains:

Hace.com
xxx
xxx
xxx

Interested in any? Give me your best offer and I might accept it.

Hace.com $3000
thanks

I accepted and after that he withdraws the offer..

Hace.com $3000
thanks

ok, I'll accept it, let me know your escrow email to start the transaction.

withdraw,sorry

we have a deal when i said we can do this deal.

All happened within the same day.
And he's not a new member at all, someone who's been around here for 3.5 years and has 23 itraders!
What this? Are deals no longer binding around here?