I think Paypal makes it a bit too easy to get a refund. If I sell something, and I receive the funds, but the buyer decides they don't like something about the item they can simply enter a complaint to Paypal and they pull the funds until the dispute is settled. Even if you don't have the funds in your Paypal account the seller get their funds returned and Paypal deals with getting the funds back from the seller.
I sold a guitar that was in mint condition. I saw no blemishes or dings and in my opinion was like new. If you've ever bought a new guitar you know having a few blemishes is not uncommon. With this thing being so nice it was, in my opinion, like new. That was the problem. Like new is a personal opinion. This guy got the guitar and loved the guitar but said he wanted to teach me a lesson about using the term "like new" so he told eBay it was not as described and so Paypal charged back my account the funds until the dispute was settled. He said he was going to keep the guitar because he loved it, he just wanted to teach me a lesson.
It took 2 weeks before he told them he was happy and was keeping the guitar and they released my funds.
At the point where you had no money, and no guitar, you should have filed criminal fraud charges, just to teach him a lesson...
I have refused to get involved with PayPal since the beginning, since they started out as a marketing firm, and the way they do business, I really didn't want my personal purchasing preference shared with anyone interest in buying those statistics, or receiving a lot of spam. I'm sure things have changed, and privacy is assured, but I still avoid them like the plague. Anyway, I'm sure there is a time limit either way, for which you must file a claim, maybe a month or two. Someone running a scam, can still string a buyer along, past that limit, and where is becomes very difficult or impossible to resolve. People tend to hope for the best, tolerate delays, trust that everything is going to work out. Most people are too busy, lazy, or just intimidated by the paperwork, to pursue resolving a claim. Scammers know that the worst that is going to happen in most cases, is they'll have to return the item, or pay the money. They also know, their chances of getting away with it, is much greater. Most of us don't want to falsely accuse anyone, and will patiently wait it out, hoping for a peaceful resolution
Best advise, is for the buyer to beware. It's a gamble, only bet, what you can afford to lose...