When you get the check just keep it as a souvenir, it's not worth the paper it's printed on. Get the guys address if you don't have it and tell the guy you will handle shipping and put a cashiers check with the package for the amount difference.
Here's the kicker..... Ship him a refrigerator box of garbage!....... COD!
I've seen this work many times. Give it a try!
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Current Stable:
01 ML55 AMG
92 500E (a few mods)
87 300E (lots of mods)
00 Chevy 3500HD Diesel Box Truck
68 18' Donzi Marine

06 GT i-Drive7 1.0 Mountain Bike (with GPS!

)
PREVIOUSLY OWNED:83 300SD, 87 420SEL, 88 420SEL, 90 420SEL, 86 560SEL, 86 190E 2.3-16V AMG, 94 E320