You are not alone bro. I noticed my rear was scratched after putting on some new rubber at the end of last year. I guess its normal with the local shops. Its not theirs so they dont mind if it gets scratched. As far as the $100 bucks to change your tires. Are you letting them take them off and put them on your bike? If so you might want to see how much they charge if you just bring them your rims. I pay around $40 taking the shop just the rims and mounting them myself. That still doesnt prevent them from scratching up your rims. If I had some CZ's or March's I would have been very upset and seen about a replacement fro scratching them.