Booster Dewey has done two of mine and both were no more than $129 out the door shipping back included. With him around I would never ever consider buying a rebuilt one from NAPA, Rockauto or whoever else. I want mine and I want as is with the car.
Check out RAM MAN you tube he shows you how to rebuild one in about 20 Minutes. If your rebuilding one that's really old you might need to repolish the bores.