Res-Up Water Softener Cleaner - $50 (Volant)

I have about three and one-half gallons of Res-Up for sale.
This is a resin cleaner for use with water softeners.
I got a new water softener and no longer need this product.
I paid $131 for four gallons, and you can have these for $50, or make an offer.
I am located ten miles south of I-80, one-half mile off of Route 19.