There are several avenues to selling crocheted blankets.
Here are a couple of articles I wrote with some advice on selling handcrafted items
Ebay Review and
Crochet for Cash. If you have made the items yourself you can also sell on etsy, here is some info for that site,
Etsy Review. Hope that helps
Any avenue you take will take some time. It always does but Christmas is coming up now would be a great time to put them out there.
Another option is donating the throws that don't sell to homeless shelters and/or domestic relief shelters. They are always in need of ways to stay warm. Good luck.