3"X6" Tubing Rack Cross on 2'X2'X5/8" Base

I have four of these racks, brackets, cross supports or whatever you want to call them. I suppose they could have all kinds of uses. They are 61" in height, the cross is 68", the vertical and horizontal rectangular tubing is 3"X6" and a little thicker than 1/4", the base is 23 1/2" square and 5/8" thick. There are holes to bolt the cross to the base and holes in the base for anchors.

No idea what they're worth, guess it depends on you! If you can think of something to use them for make me an offer. Will separate, take 1, 2, 3 or all 4. $15 each or all for $50.