We bought ours, sight unseen, from Dignam Corporation, here in Canada. They're reputable, been selling land by catalogue (pieces of paper stapled together) for around a century, so we felt pretty comfortable with them as sellers. They're very straightforward and easy to deal with, no hidden costs or any sleazy tactics. They provide lots of photos, surveys, data to go with it. We didn't go see it first because it was too far away to nip over for a speculative visit, but golly, the price was right. Super cheap. That was 20 years ago. Now that we're edging towards retirement age (minus the retirement income), we've started the building process (going with cordwood - land's got lots of softwoods - too many, needs thinning - perfect) on a piece of land we already own outright.
I think if you can confirm the seller's reputable, the price is too cheap to turn down, and you've done your research - why not?