Springfield had three versions of the SAR-8, a G3/HK91 clone. The first is the SAR-3, made in Greece on HK licensed tooling. Has a steel receiver and is a very good gun. Importation of these was halted in '89, and a number of them caught in customs were re-stamped from "SAR-3" to "SAR-8" (I have one or two such overstamp guns). The SAR-8 was modified to get through customs with an idiotic lump-o-steel on the end of the barrel and a thumbhole stock - but they were still being imported from Greece and basically the same quality as the original SAR-3 (albeit with slightly different features and a new numerical designation to get through customs). Springfield later introduced the US made SAR-8 with an aluminum receiver - total piece of crap.
If you can get a steel receiver Springfield SAR (SAR-3, SAR-8, or overstamp gun) thats a great price, but especially if its an original SAR-3. If its an aluminum receiver, I'd stay away.