Good morning, June 6995 reporting in.
I have found another source of wholesale rotary cutter blades.
http://jhittlesewing.funoverload.com...new_items.html
They are usually 10 for about %15.00
http://www.lpsharp.com/ most often exchanges your dull blades for name brand blades at a reduced cost. I do not know that he resells the sharpened blades to the public. But, this is an excellent way to recycle the blades. He will send your return order postage free.
At this point in time I am getting generic blades from JHittle and am very pleased with them. This is a wholesale sewing supply and you will find pins and needles and everything else you need. However, there is a shipping charge. I buy a number of things here and for $100 order you get free shipping. Take a look around his site.