LOL! I probably go out "junking" at least once a week, but usually only hit one or two stores. I'm sure I miss a lot, and I pass up a lot of machines too, because I just don't have the space and I'm borderline hoarder as it is!
That same thrift shop had a nice 15 and a 101 several weeks ago, both were under $30 and I left them both there. The 15 was only $15 because it was half off and I still left it there. It kind of hurt, but I already have a 15. I sort of regret not grabbing the 101 though. I went back for it and it was gone...lesson learned!