Where I live a coffee grinder is only around $10 in Home Depot or Lowe's. I gave one to my daughter and we grind our own flax seeds. My granddaughter is highly allergic to mosquito's and her bites swell to large blisters the size of quarters. We grind the flax seeds, mix it with charcoal powder and a tiny bit of distilled water, cover the mosquito bite with the mixture, bandage it and presto, in a short while the toxins are pulled out of the bite and there's not much left but a little redness. She's only 4 and she doesn't mind this poultice at all because the alternative is very painful for her! She's suffered a whole lot and has lots of scares before we discovered this remedy.
Sorry, I got carried away here. Just wanted to tell you about the coffee grinder being so "cheap."