Hard pass.

Price is fair.

The cd player seems to be the Phillips CD204 but Magnavox badged, it’s supposed to be a fairly decent player, here’s some info on the others:

www.hifiengine.com/manual_library/rotel/rx-503.shtml

www.vinylengine.com/library/yamaha/p-450.shtml

www.hifi-classic.net/review/klipsch-kg2-384.html

All in all if working correctly $300 isn’t terrible.

Yes.
also try hifishark.

Run and get this for $300. If these sold individually I one could get around $600 for all of these. I can’t imagine this setup sounding bad.

Frankly, individually it’s worth more than $300