Replying to How should I deal with this possible scammer on NS?

Hey NS, I need your advice on how to tread in this particular situation I'm in. So here's the backstory; I bought a pair of skis from a guy here for 220 and sent the cash via PayPal. The guy was unable to ship the item with USPS since it was oversized so he gave me a refund, BUT there was a catch. He claimed to have already spent $60, so he could only return 150. This was a major red flag in my head since although he claimed he would return the rest of my money asap, I was in disbelief. To add to the sketchyness, he claimed to be leaving the country for a while and would return my cash when he got back. To summarize so far, the dude returned $150 out of the original $210, and $60 is still missing. So since I sent the money using the "Paying for Items" on PayPal, I was covered by buyer protection and I issued a dispute against the guy. As I thought, there was no response from the guy and PayPal ended up deciding the case in my favor. Here's where my dilemma comes into play. So when the guy returned the $150, it wasn't as a refund of the original $210, it was as a payment, so when PayPal decided the case in my favor, they gave me $210 instead of the $60 I was missing. So pretty much I now have $150 of the sellers money, or maybe it's PayPal crediting me $210 since the guy claimed to not have a Credit Card hooked up with his Paypal. Anyway, should I keep this $150 or reach out to the seller and ask him whats up. He never responded to any of my messages after he told me he would get me the $60 back, and he never made any kind of contact with PayPal when the dispute was brought up. If the dude was just out to scam $60 out of me, I have no problem with keeping his $150 since it will hopefully teach him a lesson, but if it was an honest mistake, I'll return the cash. What do you guys think.