I would be wondering why they are selling? Yes, Legit reason of course .....but maybe they know planning is afoot for a wind turbine behind their house, or a new housing development has been ;passed, even a new bypass or something. Something like these things can have a serious effect on the value, and of course the pleasure of living somewhere.
Some places need a change of use - sometimes they have been passed for a particular thing, and there are exclusions about what you can and cannot do, what buildings can go up etc. Also, there are old deeds etc allowing neighbours rights of way through your property ......
Personally, the state of the house is not as important to me, as the outbuildings and land being suitable for my needs. Look at the fencing etc. Once you get your own smallholding, the costs are never ending .....new fencing is an arm and a leg, to buy, as is drainage etc.
Look at a few places, make comparisons, listing good and bad points.
Fingers crossed you will find a nice property.
Its best to visit, have a good look, then if its promising, go back look again, and have those questions ready.