For those that are interested but want to tweak the "rules/guidelines" for themselves that's okay.
If you can only do 1, 2 or 3 months - that's fine.
If you want to commit, but still have the ability to buy on sales. Then determine what is a really good sale, and add that to your "rules/guidelines" list. A good sale for someone, might be 50% off, and another person might be anything less than $5 a yard.
Great to see the interest (on both sides).