I want to upgrade my shocks on the FC, any one out there have a set of used or new coil over shocks for sale at a good price?

 

You may want to check out the classifieds sections:

General

Florida area

Or you can always scope out craigslist or ebay.

 

I would recommend against coilovers unless you have a race car that will be corner-weighted. Street cars are usually better off with a good set of replacement shocks and springs, and new suspension mounts and bushings are also a good idea. You can find common FC suspension upgrade parts at Racing Beat and Mazdatrix. Also, Tire Rack usually has a good price on KYB AGX shocks.
http://www.racingbeat.com
http://www.mazdatrix.com
http://www.tirerack.com

If you have a race car, then you can get good entry-level coilovers at ISC Racing, Ground Control, and Mazda Motorsports. The ISC Racing setup is for SCCA IT or EP racing, and Ground Control and Mazda Motorsports will help you select shocks and spring rates for your particular application if you give them a call. I would also suggest a full race mount and bushing upgrade, as well as camber/caster plates.
http://www.iscracing.net/2nd_gen_rx7.html
http://www.ground-control-store.com/...hp/II=41/CA=23
http://www.mazdamotorsports.com

Here is a basic overview of coilovers:
http://farnorthracing.com/autocross_secrets6.html

As suggested in the previous response, you can search the classifieds for used products.