Yes, I've some. They're circa 1984. The ones I've seen have been plain gauge Tange Champion (#5) and that may only have been only the main tubes. The component package wasn't very impressive, being Shimano Altus derailleurs, a mid-range SR crankset and Dia-Compe 980 cantilever brakes. Rims were Araya 7x, typical for the era. Basically unchanged for 1985, it would become the Prarie Breaker. Original price was sub $400.

Typically, ATBs, especailly the old school style do not hold value well and the biggest factor is condition. Unless, it is in excellent condition or a very high priced market, it is probably a sub $100 bicycle. However, we'd need pictures to provide an accurate appraisal.