Unfortunately, it hasn't happened since
And that 15k is long gone ($5k went to taxes).
I gave up doing wholesale deals when one of my suppliers screwed up, and I ended up losing a laptop that I had on hold with them, that I sold on eBay.
I didn't find out until after the end of the eBay auction, that my supplier sold the 5 laptops that I had on hold to someone that wanted 100 laptops, and they were just short the 5 that I had on hold.
I tried getting another laptop from someone on eBay, but their supplier messed up as well (my luck... probably the same on), and the buyer reported it to PayPal, and PayPal did an investigation, and tried to get me for money laundering, etc.
Luckily... the guy that I tried buying the other laptop from had a good lawyer (Christopher Darbin (whatever his last name is), from the OJ Simpson trial)... and took care of everything for me.
PayPal ended up freezing my account, and the customer was treatening crap at me, and I couldn't refund her money (without PayPal doing it), because my account was frozen...
It was a HUGE mess...
I didn't want to go through that all over again... so I stopped doing it (as much as the money was good.... sigh)