Re: I bought one of these for Christmas
"How much will it be when you've renewed your Office 365 subscription for a couple of years?"
Assuming that people want Office.
There seems to be deals around for the renewals with various prices if you do. £59.95 is the official, but I've seen offers in the £30 ish if you must have it.
However, £80 might just buy a new tablet and pass the old one on.