This guitar came up for sale in May 2011, although I don't seem to have a record of what it sold for. Guitar seems to all original, in great condition, and comes with the desirable ST and RT pickups. But there's also some cool provenance with this one. The seller was Lars Hanson, a well-known NYC studio musician who used this on several albums including Rex Smith's 1978 record "You're Never Too Old To Rock and Roll" and Genya Ravan's 1979 album "...And I Mean It." Below is a photo of Genya Ravan playing live many years ago, accompanied by an original painting of Genya's titled "Genya and Lars".
This one came back on the market in 2019 through Seattle dealer Thunder Road Guitars. It was apparently priced at $2,799, which would have been right at market if it still included the ST pickup. Seems to be in really nice condition with the original 3-way switch and no breaks to the pickguard.
"1969 Ampeg Dan Armstrong Clear. You don’t see these everyday!"
"Back in the early 60’s Dan Armstrong (at that time a guitar tech in New York city) asked Ampeg if they had ever considered building guitars, as they were well known for building guitar amps. They in turn requested that Dan design something for them that would fit the times (the psychedelic 60’s). He came up with these super funky guitars built out of plexiglass (AKA lucite)! This one comes with its original hard shell case as well as its often lost second pick up! The pick ups were designed by Bill Lawrence. This particular guitar came in as a pair with a bass of the same year."
"DETAILS Year: 1969 Model: Dan Armstrong Serial: A867D Finish: Clear! Case: This guitar comes with its original hard shell case. Weight: 9 pounds and 9.1 ounces. Condition: This guitar is in excellent condition. It comes with its original hard shell case as well as the original second pick up! Modifications: None. Available now on Gbase.com from Thunder Road Guitars PDX."