Rebuild or replace

I have a slight dilemma with my rear brakes. After getting the hub off complete with disc it was apparent that the brake caliper had either seized or the hub had got so hot with a worn bearing and CV joint that it has affected the caliper. Now do I repair the caliper or just get some good secondhand ones and fit them? These are the pads and the caliper......

Personally, I wouldn't fit secondhand brake callipers and would opt for reconditioned units as a minimum.

Remanufactured ones seem to be around £60-70 each and new about £90 each on the Bay

I understand the 2nd hand option so would it be better to rebuild what I have got?

Repair kits are about £20 each I think.

Choice is yours really. As I said earlier, I wouldn't repair them, I'd replace with remanufactured but if your skill set is up to refurbishing the ones you've got ....

The weak point on the rear callipers is the handbrake mechanism. The bearing disintegrates internally due to ingress of crap and water.
Self rebuild is not impossible but it is involved. The bearing is not normally included in the service kit.
The re-manufactured option is more expensive but probably simpler in the long run.

I understand that they replace the roller bearing in the handbrake mech with teflon. This makes it much simpler and more unlikely to seize up again.