This one came up for sale on Reverb in July 2014 with an asking price of $2,500. Here's the description...
"1970 Dan Armstrong Ampeg in very good condition. A couple very small scratches on back, and the letters CMR painted on back of headstock. Has one slide in pickup (CB) and all hardware is original. Has an old case that I had built for it in 1972. Guitar has very little wear and hasn't really been played in gigs, etc. The only reason I didn't classify it as excellent are those letters on the back of the headstock which were on it when I got it."
Back on the market in February 2016 through dealer Chicago Music Exchange with an asking price of $2,395. Comes with a single CB pickup and non-original HSC. Check out the clear plastic truss rod cover!
Neck: Maple neck with a medium-round profile, 1 3/4” wide nut, rosewood fretboard, 9.5” radius, and small dot inlays
Pickups/Hardware: Schaller tuners, one “slide-in” pickup (rated at 8.5kOhms), three-way tone selector switch, volume and tone controls (Electronics all original)
Cosmetic Condition: The plexi body has some average scratches from play wear but no serious chips or dings. The back is also nice and clean with no major buckle rash or damage. The neck has some light blemishes but it is glossy for the most part. The headstock is also in good shape with the letters “CMR” etched into the back but hardly any other wear. This Dan Armstrong is clearly a winner!
Playability: The strings are nice and low, play great, and ring out clearly across the board.
Weight: 9lbs 11oz
Case: Original hardshell