Roof – any signs of water ingress? How old is the roofing? Any crumbling plaster? Modern consumer board for electrics? Power sockets in skirting board or wall? Any signs of leaky guttering or drain pipes? Any blown dg units?
One of our mob has just bought a ‘doer upper’/ house that Jack built. We’ve to sort out dpc, new soil pipe, floorboards, carpet top to bottom, new kitchen, replace one or two rads, decorate top to bottom including priming out coloured walls, patch of garden is a garden is a jungle. So all up thousands of £s, much time and hassle. As above, people have a way of concealing nightmares, all well and good so long as it is reflected in the price and you know what you’re taking on.