When selling real estate in Texas homes can be sold and bought "as is". There is NO requirement on electrical that it must be upgraded in order to be sold. Otherwise, thousands of homes sold everyday, built years ago would have to have thousands of dollars of work done on them prior to being sold. I find it hard to believe this is a requirement any where else. What do you site as your reference? For example, up until 1996 I believe, NEC code permitted 2 hots and a neutral wiring for clothes dryers. The NEC now requires 4 wires, 2 hots a neutral and a ground. Millions of 3 wire outlets exist for clothes dryers around the country. Are you saying there is a statue, regulation, or local ordinance that requires a homeowner to upgrade prior to selling? Not in Texas. What locale are you refering to?