Bought some Death Guard off Ebay. The package arrived today, along with this note.
Hadn't spoken directly with this person, the only contact we had was questions I sent on Ebay. I put in a bid in the last hour of the campaign and was the only bidder. It was for a big lot of models, felt like I was already making out very well on the exchange.
Based on all this, he decided to just throw in Mortarion for kicks, no big deal.
If the seller happens to read this, thank you. You made my day.