I'm interested in where to find a dip tube for $10 (with the compression fittings). Considering my bargain fittings bill was a little more then $60 (dip tube, tubing, and valve), and they have the best prices I can find, I would love to find lower prices. If $60 is the best price then unless I jacked a truckload of empty kegs, I don't see how $90 is reasonable with costs/labor.
That is if this is a new keggle and has SS components which it seems to be, if it's someone getting rid of their old keggle then the $90 or $100 does sound right imho.