Is my frame cracked? I just picked this frame up for $100. Is this a crack? It looks and feels deeper than a surface scratch. I intended on this being my 1st build, should I continue? I hope I didn't waste my money
Yes, that is a crack, or at least looks to be with about as much certainty as a pic can provide. That's a relatively common place for cracks to occur, with the thick square-edged boss creating a stress riser on the thin tube.

That the line of it continues into the area where a shifter or cable stop would cover the paint adds to my doubt that it's a scratch in the paint.