What are the Check List for Buying Used Thermal CTP

[comtech]

Hi, We are a Prepress Services provider doing CTF, We plan to Install a Used/Refurbished 8up CTP
I want to know if PTR8100 is good choice, ? (we expect to do 10 to 12 8up Plates /hr)

How to check the life of Laser diode, Plate Clamps, What else need to be checked (ie cards, Optics, Balancing of Drum etc.), What is the price of Laser Diode & plate clamps ?

Which Thermal Processor to go with

Thanks in advance for any Inputs