I just scored a 46g bowfront w/oak stand, 1 emperor power filter, 2 aquaclear 70's, a heater, glass top and light on craigs for $100!
I noticed that the top cross-tank support was discolored on mine and this one was not in a sunned area - I presume its from the light in the hood.
Other than that, mine was in pristine shape. Congrats on your deal and hopefully somebody will chime in here shortly to answer your questions..
46 Gallon Bow F/W: 4 - Zebra Danio's, 2 - Red Platy's, 2 - lg. Silver Dollars, 1 - Pleco (4.5"), 1- Gourami, 1 - Cory Cat, 1 - mystery snail, 4 - Cherry Barbs, 1 - Black Molly