canuk look the house over throughly, of course look for rotten wood, & everything works, I'd have someone check the mechanical stuff & make sure its up & running properly cuz most likely theres NO warranty on anything cuz that'd be in the selling info (their way of bragging, not much really)
if you want a warranty you can buy one through your insurance for so many years from the date you bought it.
the seller most likely is selling it "as is" & anyways they could just claim they knew nothing about that problem.
as for cracks in the ceiling, no big deal ALL house's settle.
the biggest concerns would be mold, rotten/falling apart foundation, mechanical. since you said it has new wiring,windows,septic,roof.
if its oil burning furnance try to get money off for that.
otherwise if it looks decent for the price, as to what others are going for, jump right in & learn what its all about being a home owner. theres no house thats 100% perfect they all have issues that might need to be addressed.
neighbors is top selling point. good luck.