Ebay and bartertown, I got a LRC assembled but unpainted with the forgeworld upgrades for my daemonhunters, along with 11 grey knights. All for 90 usd. Normally thats more like 175 dollars.
Check around is my suggestion for anyone buying models, even if you want new, unpainted, unassembled things you can usually find them, it just takes longer. Always a good option if money is an issue.
I finished last months vow, and this months, hurrah!
Now when I get back from my field work in august I'll have to do that one too.. hopefully.