Thanks for the advice! Honestly I didn't have enough time & patience to get a great look at the thing in the downpour, but from my brief glance it seemed to be in good shape rust-wise. U-joints were definitely in need of a little loving but those shouldn't be too expensive to replace. Little-to-no body rust, minimum rust on the under-carriage from what I could see. Really only got to look quickly but my first thought was about how much worse the underside of my 6-year-newer Avalanche is...
Any way to hunt down VX's for sale other than Autotrader, Cars.com, and Craigslist? Really tough to buy something if I haven't seen it in person...this '99 by me is bone-stock, and I don't mind putting in some time to get rid of surface rust and re-spraying the frame if it means getting a good deal.
Thanks again!