Quilters,
I stumbled across a website that used to sharpen rotary blades, but now they simply take your old ones and replace them with new ones. They will swap name brand for name brand, and generic for generic. There is free shipping in the US and 4.00 for Canada.
Don't know how many of you know about it, but it is lpsharp.com out of Minnesota.
Hope this helps someone who like me, loves the craft, but is pinching pennies!