Those tires do sound like a bargain, and they are Winter tires with mention of better wear on road. I'd say that's a good choice and jump on them.
That 245/70/16 is the exact size of my Blizzak snow tires, it's a good size(29.5") for our wheels. I'm using a Michelin 255/65/16 for my non snow use, which makes them 29" and they handle better than the stock 255/70 size(30").
Tire Rack had a good deal on the Blizzak tires I've been using for about 15 years here. I passed on them at about $100, thinking I might want to change sizes this year(17's versus the 16's). But I'm going to stick with the same size front rotors I have, which let me use a 16" tire.
I wish you were closer, I'd sell you my current snow tires, for maybe $200. They are almost ten years old, but maybe have 1000 miles on them. They stick great and look almost new, but as the pure Winter tires they are, the dry wear will be worse, and they do give you more wiggle in handling. Most Winter tires are chosen as a rather narrow and tall tire, and even for a given size, they don't steer as tightly as a normal Summer or A/S tire. I'm going to buy the Nokia studded tire next, and sell these or use them up fast on my route this year.
Great tires make all the difference in the snow.