He posts on every thread where someone is looking to buy something buy saying He has whatever it is but he always slips up when he posts the skype ID live:techviem1 https://archive.fo/vaODR
A google search of that skype ID shows so many red tagged accounts.
This post puts more names to him https://archive.fo/o/vaODR/https://bitcointalk.org/index.php?topic=1199671.msg36259631%23msg36259631
So HumberBaccarat posted this post: https://bitcointalksearch.org/topic/m.37827097 with the skype account mentioned in the OP as his contact method. And at least skrillexlegit has used the same skype.
The connection here is pretty clear, and he's still using the same tactic of posing as a digital goods seller most likely to scam others given his shady past with his numerous alt accounts.
At any rate, this person isn't to be trusted with anything because his known alts have been tagged for scams/shady behaviour. Really good catch, OP.