Looking for a cheap square taper american bottom bracket- preferably with adjustable chainline. Anyone know of a source?

Go to danscomp.com, click bike parts, click bottom brackets, click lowest price first and you have your choice of one american, and two european bottom brackets for $30.

I don't think you're going to find an american BB with standard 17mm square taper axle. The ones at Dan's won't work, only the Action-Tec euro BB is 17mm. You could always stick that BB into an american conversion kit, but that's kind of a janky solution. What do you need it for, maybe there's a smarter option?