I carry KAI 60mm Round Blades, KAI 45mm Round, Pinking and Wave Blades in my online store. They're made in Japan of Tungsten Steel, are very sharp and will probably outlast eight of your recycled steel, bargain blades. These blades will also be very kind to your hands because they are very sharp. This means that you don't have to exert as much pressure when cutting.
Happy Quilting
Scissorman