I'd look on http://craigslist.org/
select your state in the right hand column and go from there. Look (search) for a chest freezer, I wouldn't spend more than $50 to $100 on that, then put "brewing" in the search and see what you find... maybe you'll find more stuff you want. Go to a department store and pick up a cooler for your mashtun... about $16 to $50 depending on size and make etc. Buy some tubing, an 8 to 15 gallon stockpot... $100 to $200. Get a stainless steel canestick for siphoning... ~ $12. Get some Starsan... ~ $17. Get some LME (so you can still brew that if you want), get 10 to 20 pounds of base grain, a pound or two of crystal, and maybe another pound of specialty malt. Get some yeast while you're at it. As has been said... valves etc. are "not" required unless you want them. Get a turkey frier... if you buy a turkey frier kit, you don't need to buy another brewkettle (stockpot) for a while and that will save you more because you also get the burner with the kit. Get at least one 20 pound propane tank. Get some whirlflock tablets. Don't forget the Temperature Control.
Hmmm... thats about it off the top of my head, and you should have money leftover even. Oh.... one more thing... get a Water Report... another ~$22 to $25 by the time you include shipping.
Once you run out of those ingredients you'll probably know exactly what malts you want anyway.