There are some expats on FB who write on a post their need, and then find a match by browsing the previous posts. I tried it once with a guy who wanted to sell his pesos for my GBP through TransferWise, but he didn't want to meet halfway the official rate (back then, there was no blue). Instead, he wanted to give me a slightly worse Azimo rate because 'he was doing me a favor'. I told him I exchanged with relatives(friends meeting halfway and that the whole point of exchanging peer-to-peer is exactly to bypass the fees!
I guess I've been a victim of the so-called European-supremacists.