Brand-new, the box has never been opened. This is a mobile base kit to allow your power tool to be moved around the shop; it has a locking caster system. The price is firm.
Comes with a 1-1/8" x 2' x 2' plywood base, painted in dark green (two coats). The plywood was quite expensive as well.
This would cost $132 with tax today.
https://www.grizzly.com/products/grizzly-bear-crawl-build-your-own-mobile-base-kit/t31563
I bought two of these four years ago but only assembled one. The last two pictures are of one of my grinders mounted to the same Grizzly mobile base kit and a Grizzly stand; I have a spare new stand like that for sale as well (and that grinder/stand/base pictured is also for sale).