Wow! $1.79 for two blades. Worth a try. Was just there last week buying a magnetized metal bowl to keep my pins. I also use it to pick up any stray pins. Very strong magnet.....Will have to buy blades next time.
I use a blade sharpener and it really works. Bought it at the 50% off sale at Hancock Fabrics. "Colonial Dual Rotary Blade Sharpener 45mm" Love it.