PTI felt is expensive if you need a lot of it. Try a store like
Erica's sewing, their prices are better. Now, these prices are for a wool 'blend' felt, meaning it's not 100% wool like PTI's. But IMO unless you are creating an heirloom penny rug or purse, 100% is not necessary. There's enough wool in this felt to be much sturdier than the craft felt. I've been using it forever and never had a problem with it.
HTH