In the beginning, I bought clamps when I needed them for a project. Having a very small shop back then (12x12), I didn't have much room for a lot of things including clamps. I "make do" with 14 3/4" pony pipe clamps, 14 24" extensions and 7 6" extensions, 3 18" quick grips, 4 6" quick grips, 5 corner (picture frame) clamps, a few C clamps, a strap clamp, and a few spring clamps. They all store in a roll around cart that fits under my workbench when not in use. This seems to be quite enough for what I make. I guess that's the measure for those of us with limited storage space (or money). In my old shop, there wasn't enough room for all of the tools and some sat outside in the basement until needed.
I've gone out to find myself. If I return before I get back, have me wait for me.
"Sawdust is Man Glitter"