i have a Yamaha CT-710 am/fm stereo tuner and a CA-710 amp, both of which are in perfect working order and both with their original manuals.

Does anyone know how much i could expect to get for them, if i were to sell them, or if i should sell them at all?

Any information would be appreciated.

Unless you need the money, don't do it. Yamaha of that vintage was good stuff and some of best looking gear you could find, espesialy when you have a matching set. Take it from somewone who has regreted parting with many pieces. Find a good little pair of Paradigms or if you want a sexy vintage system, a pair of B&O S45-2s(with their stands) and a new Rega P1 table and enjoy.