For what you're planning, if it looks like it's generally worth about what the guy is asking, then yeah, buy it.
It doesn't sound like it's going to stay 4x2 for very long, and you've got lots of options with toyota and samurai stuff to look into.
Make sure it runs good, and isn't completely rusted out. The soft top models usually rot out near the rear wheel wells. Definitely check that out.
-Mooch.