I have an aluminum LS7 flywheel that is brand new in the box and a take out LS7 clutch assembly with 1,200 miles on it. The clutch is in great shape and was removed when some mods were installed to go with a twin disc. Car was bone stock the entire time the clutch was in it.
This is a great clutch setup for cars making anything under about 450-500rwhp. It retains stock driveability and pedal pressure while holding a lot more power.
The flywheel goes for $450 (or more) from a vendor and a new clutch is $250. I'd like $460 for everything.