Most people sell them for 2-3 diamonds a stack ;-; 1st. There isn't a high enough demand for them .-. 2nd. The average DC goes for at most 27 diamonds 3rd. There are tons of them, as they used to be sold at a public demand. I will add quartz slabs now
Depends if someone is in the mood for buying blaze rods.......... As I said, it's all about the demand of the time in which you are selling them.