https://www.amazon.com/Schley-Produc.../dp/B0014DF1AG
3vz was great for its time, but came out 32+ years ago and most people never adjust valves which is critical on this one, so by the time you get it, ~17% of your compression is going right out the #6 exhaust valve, throw in all the other valves, rings etc and prob double that. It would have pretty poor displacement and fuel consumption to power ratio by modern standards even when new. If you get a deal and rebuild top end and maintain it, it can be a decent and reliable engine.
I don't think they're worth the prices most people are paying for them, but honestly I think that about most used Toyota 4wd these days. Nostalgia market has gotten a bit crazy, it'll correct next recession. The 3vz def wasn't a high point for Toyota though, and they're kind of a pain to work on.