... Does anyone here use it regularly and trust it I wonder ?
I also use eBay all the time, and sell occasionally. Just like anything else, if it looks sketchy, it probably is. If there is any serious negative feedback on the vendor, it's probably worse than reported. I always weigh the risks/benefits, always pay via a credit card (you have that as protection if you don't get what you expected) and have had a 98% positive experience overall.