I have researched Joann's current sale. There are actually more brands that I realized.
Singer is 6 for 12.99 =2.17 ea
Clover is 5 for 12.49 =2.50 ea
Omnigrid is 5 for 13.49 = 2.70 ea
Ergo is 5 for 11.49= 2.30 ea
Olfa is 10 for 28.49 = 2.85 ea
Fiskar is 5 for 12.99 = 2.60 ea
Olfa is 5 for 17.49 = 3.50 ea