Use mark at Performanceautosport.com, if you are seriously interested.
The SA 10 is very rare, only the true collector has them. Then there is the 1 SA 5, even more rare.
Expect to pay top dollar for an SSC model. (white with Gray trim and yellow/gray decals)
Other than than those above, average foxes go from around $8000-$20,000. Obviously price depends on mileage, coupe, vert, hatch and condition. Even a crappy one sells for $4500+.