dayum man. all i can say is future advice or advice for anyone:
you can call a bank with the account number and name to see if funds are available to clear a check
always meet the party at the bank to cash the check immediately if they refuse a certified or cashiers check, then once the transaction is complete you can release the product
get a lawyer. most likely the check is fake.
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if you can only race me in a straight line then whats the point 
...91 SMF SCCA
http://www.flickr.com/photos/8341770@N07/5601083432/http://www.flickr.com/photos/8341770@N07/5601083432/ by http://www.flickr.com/people/8341770@N07/, on Flickr
I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production