I have the much (most?) desired pad for us hammock folks... the FS: Gossamer Gear Thinlight Insulation Pad 1/4" Wide.
I paid $40 bucks for it (product + shipping)
It has been out of stock for a few months now.
I suppose $30 bucks shipped (CONUS only) would be a fair price. PayPal gift only.
I have never used it on the ground. I only used it once in my double layer WBBB. Worked amazingly well. I switched over to using UQ's so no need for this anymore.