Syncros Ti post! ^^^ Nice old original Goose. The Horst link, while effective at reducing negative pedaling and braking feedback, is slowly disappearing to the wayside because of the new shock technology (platform damping). Most modern full suspension MTBs' today
have one-piece rear "triangles" or structures for good reason. No maintenance, stiffer, stronger and simpler, aided by shock platform damping.
These are now pretty standard on most all new MTB's. The DW Link and VPP designs running off the seat tube/bb junction are clearly superior in every way over the Horst Link design, which solved a problem during an era when suspension technology was in it's infancy. It comes from F-1 racing designs. Pedaling and braking feedback, because of the new shock and linkage technology is almost a thing of the past. The Horst Link rear ends, while effective, will be relegated to the dust bin and soon. I have run horst link bikes , "single pivot" bikes with fake Horst links (alternative seat stay placement), elevated chain stay bikes, and almost every other FS design over the years and they are all going by the wayside imo. Not saying it doesn't work well, it is just not needed any longer. Dating myself a bit here.
And back to the amp bikes.....I think that these bikes, if low mile and original, will be very very collectable down the line in the vintage mtb circles, as well as all the boutique brand component manufacturers of the day that the bmx crowd still seems to covet. Why? Most of these bikes were ridden hard and eventually broken by hard-core riders and racers. Very few sat around unridden in garages...If you were committed enough to own one, you rode it hard until it broke! (can you say "aluminum"? Battle, Dagger, Amp and all the others will be highly desirable if in top notch shape because most were actually ridden into oblivion..