I have a two sets of pads for sale at $5 per set.
Similar pads sell for $21 plus tax at Mountain Equipment Co-op (https://www.mec.ca/en/product/5057-725/XT-8-16-DH-Sram-MonoM4%2BNewM4-Aggressive-Brake-Pads)
For Formula B4 / Racing XC / Extreme FR / DH / BR / Team / Pro / SL