I got an autoharp on eBay a couple of weeks back. It was cheap, but fairly beat up. 32 of the 36 1970s-vintage strings were intact, if very tarnished. I spent more on new strings and a tuning wrench at Elderly last weekend. After spending a few evenings cleaning (you don’t want to know what I found in it), replacing strings (fiddly) and tuning (slow), I can now make 1970s sounds. Fun!
(and yes, before you ask, it does appear to have two B♭7 keys.)