Ahh I see.
What cities do you search on craigslist? I know tampa is ALWAYS full of great setups. i search like 4 different cities all within an an hour and a half. You might need to extend your search area.
Whats kinda funny is I have a 75g tank and a metal halide fixture for sale. Just don't have the stand. It's also not drilled. :-( If you are interested in my tank and light send me a pm.
BUT back on topic. Yep, keep an eye out for the 75g, it may take a few weeks to find the perfect setup. i know it's exciting and all but take your time and don't settle on anything that you might regret.
You can post potential setups here and people will chime in to help.
The most important things to look for in a setup are:
Clean and seals are all good in the tank. No major scratches or anything like that. make sure the stand is sturdy and check for bowing to make sure ots still structally sound.
Then when you ask about equipment you are looking for brand and type like a aquaticlife T5 6 bulb light. Same with a skimmer, get make and model if you can.
You'll soon be able to spot a good deal on CL
once you get a handle on everything you are gonna need.