Those callipers are certainly a good price. For peace of mind you would want to get new seals (not cheap) and of course brackets. Does anyone make brackets for them?
I doubt anyone makes brackets for them but I'm pretty friendly with the machine shop at work and a couple own race cars I might be able to get some sorted out.
If I don't buy reconditioned they will be rebuilt the kits are only $110-150 us for the pair.