If your extension cord gets tangled up, don't pull on the ends. Instead, gently loosen all the tighter snarls in the middle until them become larger loops that can easily be untangled. A way to avoid tangles is to use a retractable cord reel. It will let you reel out only the amount of cord you need, then quickly reel it back when you're done.
Before putting your house on the market, attend a few open houses at similar properties in your area. That will give you a firsthand basis for comparing your home with competing properties. It’s also a good way to take the pulse of the local market and to spot some of the selling brokers who are active in it.