Spent a lot of time trying to "fix" some of the suggestions that aren't really broke man ......?! In answer: Location: If they are in the same country litigation is straight forward, as is legal support from your friendly police person(?). Sale: Clarification of their reason to sell. If they are legit, they will tell you openly, why it has to go (stolen is not a valid answer!). E-mail: See response 1. In litigation, paperwork and fact count; supposition and "I thought it was.....", do not. Once you are committed on paper, it makes things a lot harder to dispute and forms one aspect of the contract you are entering in to (the offer/acceptance interface, if you need to know!). Local pick-up: Not an issue I can see, if you really want to sell the item. As an aside, work out the value of the item you are buying and see if there are "new" deals to be found on the internet that better the price. I have seen many amps/guitars go for a great deal more than you can buy them new...!?! Peace.