Individual wheel weight scales.

Does any one here have them? If so, what brand and are you happy with them?
One of the things i am most curious about with our cars is the weight i would love to have a set of scales, but i dont know if my curiosity is worth $700, the most inexpensive i can find. I have lots of cars i would like to know the weight of that are my own, but i wonder if i could weigh other peoples to recoup some of the price. Do you have scales , and do you do other peoples cars?