Here's what I'm working with, a 1980-something Raleigh Marathon:
I picked this up for $50 which was really too much considering it has a bolt-on, steel rimmed rear wheel and lots of paint damage on the frame, but I quickly sold the Suntour bar end shifters for $30 so I'm only into it for $20. My plan is to turn this into a townie grocery-getter that I'll actually use this time. Upright bars, 1x drivetrain with thumbshifter, rear rack, and a new paint job. Lots of work ahead!