Considering you got scammed before I'd be very cautious of who you use as a middleman. Don't just go for the first option or whoever is the best at convincing you they're trustworthy. Find a user and make sure to check out their rep and even if its +1500 make sure to look at what the negative reps are for. Also the longer the user has been on the site, the more rep and more money they've spent, the less likely they will scam because they have a lot more to lose than a kid who joined this year and made a few deals. Good luck finding a legit middleman but don't rush anything.