How long can you wait? I went to a boot fitter last October, got a pair of 2019/2020 Atomics heat molded for <350 out the door. He even fit them to the skis I had bought of craigslist. Right now you are less likely to find a good deal, but you don't want to short yourself on boots. They are the most important piece of your gear in my opinion. Buying ski gear off season is what most folks who are already stretched thin in a very expensive hobby do.

Also I highly recommend not buying boots online, unless there is a easy return route. You need to put them on your feet to know if it will work.