a certified check is a check issued by the bank only with available funds. when he gives it to you call the bank right then and there to verify the check. or go straight to the bank with him and depsot it. i wouldnt want to carry that kinda money with me either to easy to get robbed and for an 08 im sure ur asking a nice price for it. as for ur plates dont do it always keep ur plates he can go to the dmv and buy a daily temporary sticker its real cheap. i sold a frined my car and gave him my plates he got $3000 dollars worth of tickets and my license got suspended because of that. ur plates r like ur id.