His value with a year remaining is about £15m I reckon. He'd have a lot of takers on a free transfer and would be a great squad option for most squads outside of the Sky teams.
Normally he'd command a wage of about £75k a week, around £4m a year there or thereabouts, so if somebody bought him now it'd be an investment of about £27m all in on a three-year deal.
Teams might as well wait 12 months, get him for free, and he'll be able to get £100k I reckon, about £16m investment over three years for teams which barely gets you a decent Championship strikers nowadays. I imagine he'd do well as a squad option at Palace, Fulham, Newcastle, West Ham, Wolves, etc.