I also went to CL
when i started off on my fishtank hobby and got my first tank, 36 bow with stand, cfl lights, some new crushed coral substrate, filter, heater, and some FUGLY decoration (I was required to take it to get the rest of the stuff) for $150.
Not sure what part of the country you're in, but looking at the NJ CL
listings I found around 5 or 6 good 90 - 125 gallon deals in the last 2 days.
Alternatively, take what you wer gonna spend and hold onto it until you can get something htat'll actually do what you want. If you build a tank because its what you CAN do you're going to lose interest in it quickly.