Image: IDG / Mark Knapp It’s rare to find a low-priced laptop that has performance, battery life, and plenty of extras like a touchscreen, all at a significant discount. Best Buy has one such laptop on sale today only: an HP OmniBook 5 Flip with an Intel Core 7 processor and 16GB of RAM for just $549.99. That’s $250 off the retail price, and it expires after today (August 22nd). This laptop was already a pretty good value at $800, thanks to that Intel Core 7 150U processor with 10 cores and...