Toss in the $50 or so shipping.

My bet is the $50-100 won't pencil out by the time you've had the frame prepped, gotten parts, etc.

And it is 650B wheels. What advantage is that off in the hinterlands?

Caliper brakes, I don't see rack eyelets; So I'd wonder about the handling. But it would make a neat rando or century bike or maybe CC touring.