buying/selling vacant land out-of-state

[Katy Nguyen]

I saw a few Craigslist ads selling vacant land in other states.  Is buying/selling land out-of-state any different than if that property was in the same state?  I understand that in some states, there needs to be a witness when the seller signs the contract.  Other than that, is the process of buying/selling land the same for all states?  Thanks.