Idk, I thought $3.50 was good for full ceramic. I've paid $5 & $6 per for full ceramics, trying out different brands. Point me towards the cheaper ones if u don't mind. I use variation of fadedawgs technique using popcorn/fluff/seeded sht. 2min wash, slight agitate, 2 min wash. Filter quickly thru strainer and then refilter thru coffee filter. Im no expert though, just experimenting and stumbling my way through. And no target returns cuz I'm turning extras into carts for personal use, so any return is good enough, no calculations needed. They're potent, taste good and don't clog in the right cart. Works for me.