I've used Priceline for hotels before thanks to this site, but I've never tried to bid on airfare. My question is if I plan to start my bidding at 40% off the listed price, should I bid 40% off the price that includes taxes and fees or 40% off the price BEFORE taxes and fees? For example, the flight I am looking to bid on is from Memphis-Vancouver and is $360 before taxes and fees and $450 when they are added in. Thanks! :)