I found GoodieGumDrops1 on Agora for 5-MeO-MiPT, and UnclePyshcedelic, also on Agora, for 2C-B, but am not sure if they're legit, or if there are better vendors on this market or others. The MeO is listed at ~.0475btc for 100mg, the 2C-B at ~.138btc for 1.5g.
I HAVE 4-MEO-MIPT