Ok i think Irelands name is being let down here, I see what drifz1 is saying about being disappointed in buying things, I got a mini moto that had a missing recoil but was missing alot more. Its not fair, but leave it at that, dont try to get revenge on someone else.
If i was you drifz I would say, something has come up and I will have to put off the viewing of the blaster until next week lets say, in the mean time you go find the part for the carb off ebay or the like, and replace it. Your in an awkard situation in fairness, but if he really wants the quad he will keep interest, and if not there will be alot more interested in it.
Maby its just me, but when i sell something, no matter what it is, Im 100% happy with it, and give them my number just in case any problems happen...never got a call back yet