This bass came on the market in May 2014 with an asking price of $2,250. Seems like a pretty intact example, with the minor exception of some epoxy repair to the pickup.
"Here is an incredible example of the now-famous bass you see. This is a 1970 Ampeg "Dan Armstrong" clear lucite bass guitar and original hardshell case. Also included is some very interesting little accessories- an old Ampeg paper envelope with 2 replacement bridges, the original truss rod adjustment allen tool, and an old price tag from an earlier sale at some point."
"The bass is all original except for a very slight repair to the cosmetic anomaly that often occurs in the epoxy pickups. The epoxy can often become brittle. The deterioration is mild, and was actually well-repaired, and does not affect the performance or sound of the electronics at all, and is purely cosmetic. Hopefully the photos reveal just how minimal that is. Otherwise it is very clean and completely functional and intact. Both potentiometers date to 1970 as well as the serial number (see last photo). It plays and sounds amazing. I had personally never played one of these models until this became available and was really impressed by the playability and TONE it offers. The lucite body is surprisingly resonant and really allows for a near-perfect tonal response. The pickup, of course, is the real gem in the line itself. It has a distinct look, feel and sound that should be in any bass player's arsenal."
"The bass has a few signs of minor wear and usage, but overall very clean."
"The original case has some wear, but still intact and all latches work."
"It's a great opportunity to add this model to your collection!"