I have bought and sold two houses (primary residences) in the past three years. All in seller's markets. When you buy, in a seller's market you need to be under contract for the house you're selling. You don't need to have closed yet. Then, you can start looking for houses in the new market (or just a new house in the same market). Then you don't have to worry about opening a new bridge or home equity loan. If your selling market is hot (most are right now), then why bother with all the hassle of an extra loan just so you can go shopping a few weeks sooner?