Win A PS3 From Dillsmack

Dave is having a contest for a Playstation 3 he bought way back when they were crazy expensive on craigslist. Basically you send him 1$ in paypal and you get 1 raffle ticket. When 750 are sold the script does a select random from the database and chooses the winner. The funny thing is he left my house about and coded it while on the road from his EVDO Sprint conneciton on his laptop. What are the odds off all the tickets being sold before he reaches home in 5 hours? Update: Dave made it home and its sold 402 tickets. Not a sellout but pretty impressive