"having it magnafluxed" does not tell you the bore size, if it was seized, or overheated, or if the crank was re-ground, or bent.
You don't need magnaflux to tell if there's a hole in the cylinder wall, or a crank journal is scuffed up.
It does require someone to completely dis-assemble and clean the entire engine, and I certainly wouldn't do that, and pay half the cost, to sell it for $200.
