That's got to be the one that had its
5th eBay listing end Monday with a "reserve-not-met" of $5,809. Its 4th listing ended with a winning bid of $9,900, but I have to assume the winning bidder was penniless... It is Chalet #0661, built 8/76.
As ever, I'm always grateful to have more eyes out there looking for these. There should be another '76 Chalet on the north side outskirts of Boise that I never got the serial # to, it shows up on Craigslist occasionally.