Well, Randy, unfortunately, CCubed is right on with his value.
Back when you could buy MilSurp rifles for 20 bucks (or less), lots of people cut them down (or put on cheap aftermarked stocks) to turn them into inexpensive hunting rifles. And the cartridges (.30-40 Krag, .30-06, 8mm Mauser, and .303 British) make fine hunting cartridges). Many, many old Krags, Springfield '03s, Mauser '98s, and Enfields met this fate.
As a result, the one's in original, unaltered, military condition became fewer and fewer and became more and more valuable.
In your particular case, if you don't mind it looks and the fact that it's a bit heavier than most commercial hunting rifles, that No.4 MK I can make a fine hunting rifle.
The action is fast, smooth, and strong, and .303 is a fine cartridge for deer and black bear.....and in Canada, it's even taken a lot of Moose.
I'd say, if you can get it for $150.....go for it.