enlargers are sort of low-demand right now -- you can pick them up for less than $100 easily, including Leica enlargers if you are lucky.
Parting them out makes the situation more dicey -- why buy parts when it is easier to buy a whole enlarger? I mean, when a bulb in a movie projector burns out i buy a new projector -- it's cheaper and thrift stores have them pretty regularly.
ditto enlargers -- my suggestion is see if you can find someone within driving distance who wants to set up a darkroom and make it worth their while to take one off your hands. Unless you are selling a Leitz Focomat, if you make $25 on the deal consider yourself lucky.