The handy Pony edge clamp, which allows you to clamp work perpendicular to a surface, is on sale for $7.64 at ANTOnline. While used primarily for woodworking, specifically edging and fastening trim and molding, it also works well for odd welding setups and other lash-ups.
Just a short note on the travails of finding the lowest prices: several places, the typical bottom feeders, showed lower prices in Google shopping. But they either don’t have the item in stock or their website malfunctions. ANTOnline actually shows the shipping up front, which we like. As with anything in Dealmonger entries, it’s always best to shop around yourself and check Amazon to see if the item has free “Super Saver” shipping (this does). The web is a fluid place.
Pony #3325 Edge Clamp [antonline.com]