Buying used isn't a completely bad idea, particularly if you're tight-up for up-front money, but there are a couple of things to keep in-mind.
The Bridgestone Blizzak "Studless Ice & Snow" line, designated by the WS-prefix, utilizes a dual layer winter compound, with the top near-magical layer only going about half-way through the tread depth. Finding a lot of "still half useful life left!!!" used WS-series Blizzaks on the market in wintry regions is not uncommon, and while still technically correct, the main use of the tire has already been expended, so you should drive a good, hard bargain.
And while the old myth that winter tires somehow lose their effectiveness when stored for a long time has now been dispelled, what was eye-opening for many of us enthusiasts to see was just how much worse their performance in terms of hydroplane resistance and slushplane resistance becomes - much more, much worrisome than their decrease in snow-moving capabilities.
my stock tires were awful last winter and I almost got into a couple accidents. in my neck of the woods with all the ice they spread I'm dealing with very slippery snowy slush that makes it impossible to steer or stop
With slush being an issue and how badly the Michelin Xi3 tested this year with regard to that factor, it's hard to press its recommendation based on such a consideration - however, depending on your mileage needs (i.e. if you'll burn through the Bridgestone WS70's top layer too fast) it may be a compromise that you'll need to live with. The Nokian R2 definitely merits a look, particularly if your pocketbook is healthy.
In your post above, you said "...with all the ice they spread"
- I'm going to read that as a typo/mistake, and that you meant to say "salt" or "anti-icing agents," right?
If actual *ICE* is your biggest concern, then depending on just how cold it gets in your area as well as road-use legality, studded winter tires may be worth a look.