You're a noob to this forum.
Suggestion - ask marto to post here verifying ownership. Further, since he's hosting and a trusted member here - ask him to escrow the deal.
+1 also
you can have them delivered to you or extend the hosting. Price: 3.5 BTC includes the miners and hosting + setup fee. Does not include electricity
This includes miners/hosting/setup but NOT power? What sort of hosting is this?
EDIT - I just realized you meant hosting till end of year so the power was separate, It's just a different way of doin it i suppose.
also What is the total power draw so I can work out a rough cost.