If you get a new aftermarket one, you'll have to have an exhaust shop relocate the cat and run o2 sensor wires down under the motor, so you're looking at more than just the cost of the exhaust manifold.

$250 for a junkyard exhaust manifold is absolutely outrageous. Is this an actual quote (from a human being) or an online thing? That is flat out highway robbery.

And you don't need a mechanic to remove your exhaust manifold. Its super easy... just unbolt the heat shield, unbolt the nuts holding it on where it meets up with the motor and unbolt the bolts under the car where it meets up with the exhuast. Then just wiggle it out. No mechanical ability required (beyond lefty loosy, righty tighty)