Dank did buy 4.20 BTC off of me a while back, and he paid .420 BTC to Squall that month as payment. Not sure what he has left of that.
For the record, Dank did ask to buy more from me recently, but I don't have any spare coins to sell, so I do think hes trying to get ahold of some more coins to pay to Squall.
Dank is a strange cat, however I think hes a good guy. I'll know for sure once his debt to Squall is paid off in its entirety.