That sucks man. I hope this doesn't sour you on VX's all together. I got mine for pretty cheap but if I go through and do the math as to how much I've put into it so far... Ah, I just don't go there. At least my seller was open and honest. Knowing what I know now though I would have negotiated even lower. Oh well, knowing what I know now going back through life would make everything a much different experience. You can probably get replacement cross-members cheap and easy to replace the rusted ones. That doesn't do much for the frame but it's a start and may make it easier to sell if you decide to.
Good Luck!
Scott