I bought a 9000 # assymetric Eagle lift at Corvetts at Carlisle about 3 years ago. Installed it myself, toughest job was taking it out of the bolted up crate. Price was right for someone who does not use the lift daily. Has been working fine.
Best tip I can give is to get assymetric arms. They put the car further rear of the posts so you can open the doors wider while on the lift. This is very handy on a C-4. Shop around.