I just saw that Designbysick.com has their all their design packages at 99 cents each. Better yet if you want more that 15 designs you are better off with their membership special. For a limited time (not sure how long the limited is) and for $15.00 you can get an 8 day membership and download as many designs as you want. You should be able to download alot more than 15 designs in an 8 day period.
Now that is a good deal!! I am not affiliated with them, just a collector of embroidery designs for my Topaz 20 and grandmother of 5 with alot of projects ahead of me.