I just checked out the Thorneydale Home Depot in Tucson and came away with my wallet lightened, but clamp collection increased.
24" Bessey K-Bodies for $25.00 (Regularly $34.95) 31" Bessey K-Bodies for $30.00 (Regularly $37.95) 40" Bessey K-Bodies for $33.00 (Regularly $39.95)Note, I may be off a bit on the regular prices, I'm going by memory on those.
They also had some 50" on sale, but the savings on those wasn't all that great, so I passed on them.
I think I got the last 4 24" ones, but there were still 31, 40, and 50" clamps left. I can't afford to save any more money, so thought I'd pass on the information. :-)
Bummer is I now have to expand the clamp racks, I had to move a few things around in order to make them all fit.