One of the things that gets lost on prospective homeowners of these old houses is how expensive it can be to rewire an electrical system. Many of these old houses have poor access points and channels to run the wires necessary to supply power to modern day appliances.
Many old homes have old receptacles, sockets and panels. Also, many of them have aluminum wire and you should look carefully to see if there are any scorch marks around the base of the walls.
If you are looking to buy and old house, give me a call and I can give you a few more pointers to look at if you are thinking of buying an old house.