Best way to replace non/CD radio

I have a Silverado 07 with a AM/FM radio. I would like a CD player, don't care about Mp3's etc. What would be the best replacement??--Reasonable priced?
Ebay?.

PS--I looked at Crutchfield, the radio is 140.00 but they say you need a adapter "80.00" in order to keep the door chimes, etc.

Thanks Stash

I would go to a local shop and see what they have, I kept my door chimes for $40. But with the new silvy, it may be a different adapter. Do you have bose and steering wheel mounted radio controls. If so you will need a couple other adapters

I just have a standard AM/FM radio. No controls on the steering wheel.
Thanks Stash