This 1971 Dan Armstrong came up for auction in April 2011 and sold for just $872. Considering that an ST pickup in decent condition is worth perhaps $500 alone the buyer got a really good deal, although there does seem to be some pickguard damage and changed knobs to contend with. One interesting feature is the "R" after the serial number, which supposedly means this was a rejected neck or factory second. Our guess is toward the end of the manufacturing run in 1971 they were trying to use up all available parts, so out it went.
This one came back on the market in October 2013 with an asking price of $2,700. It's basically the same guitar, but the new owner has replaced the broken pickguard. The pickup selection has changed as well - the ST is gone and in its place is an RT and newer Modern Drive. Protecting it all is a leopard-lined wooden guitar case, which is certainly on the unusual side and adds a bit of drama. Here's the seller's description:
"This is an original Ampeg Dan Armstong guitar from 1970-1971. It's is in really good condition, plays & sounds real good, and is mostly original with the following exceptions: replacement pickguard, replaced volume pot & non-original knobs. A couple of decades ago the guitar was actually stepped on, resulting in the volume pot getting damaged & popping through the pickguard leaving a gaping hole in the original pickguard. So that pot was replaced right away. The original pots had half-round shafts but the replacement pot has a conventional shaft. The original knobs were for the half-round shafts and they didn't fit the regular pot shafts. So the original knobs (lost long ago) were replaced with similar-looking metal knobs from an old stereo system. The original pickguard is included, but I had Pickguard Heaven make me a replacement this summer. I also picked up a reissue Modern Drive (MD) pickup which I will include. It goes nicely with the original Rock Treble (RT) pickup. Also has 2 extra bridges - one a bit higher & one a lot higher for playing slide. Non-original, but vintage, 'tiger-skin' lined case is included. Shipping is free in North America, to be calculated for other continents.