[greasemonkey08101]

I'm in the market for some wheels right now and was looking at reviews of shops that carry them. I made a couple calls and found that one of the shops, (well reviewed) offered me a price and then the sales guy said "if you can write me a good review I'll give you $xx. off". I'm tempted but what if I don't write up a good review or what if the order isn't right, will they take back the discount? Isn't that kinda like paying for reviews of service before you receive it?