Why are pulley systems soo much money?

[camaro2nv]

I must be missing something. Maybe its because I come from the import crowd. My last build was a higher end import, a G35. I thought parts for that car were pretty high. I TT kit was about 10k. Aftermarket pulleys were about 500.00. So I just bought a LS2 for my 69 Camaro Im building. I start looking for a aftermarket pulley kit and I price em about 2500.00. Did I miss something? Or does someone need to come out with a new kit that is cheaper? Just trying to understand