They appear to be 99-03 'PBR' brakes.
Measure them, and if they are larger than 13" diameter rotors, they are Mach/Bullit/Cobra discs, if they are smaller than 13" diameter, they are the GT 'PBR' brakes. Either is a good setup. Both are aluminum dual piston calipers, unlike the earlier iron single pistons. They are great upgrade brakes.
Some problems:
If they are the larger Cobra brakes, they will NOT fit any rim less than 17" in diameter, and some 17" rims don't fit over them.
If the spindles are from a 94-95 car, they will only be 3mm per side wider in track than an 87-93 car (Wider on a pre-87, but I don't know the exact amount.)
If the spindles are from a 96-98, they will be about 6mm per side wider still than 87-93.
If the spindles are from a 99-03, they will put the front tires 13mm+ (1/2"+) wider than 87-93.
These are some things to consider, especially when dealing with wheel fitment and keeping tires inside the wheel wells.
If you are putting on the spindles, then picking wheels/tires, you can take this into account before hand, but if you already have the perfect wheels/tires, and don't want to change, this can be an issue.
If any of this is a problem, sell them.
PBRs should be good for $150, and Cobras might bring $250 to the right person. (The condition of your set might be a problem for top dollar though.)
(I recently got a pristine set of Cobras for $200, but I wasn't looking for them, they just presented themselves.)