Current K-Body clamps are discontinued and being replaced with new spiral handled models. Old style 40" & 24" are being "blown-out" at Lowes & Woodcraft among others. Woodcraft prices are slightly lower than Lowes so bring a printout of Woodcraft to customer service desk at Lowes and they will meet and beat by 10%. http://www.woodcraft.com/family.aspx?FamilyID=315
Another notable sale is on Jet clamps at Rockler: Cabinet makers set, 2 ea 40" and 2 ea 24" clamps, 4 pack of framing blocks plus a rebate form for 2 ea 12" clamps for $159.99. That's like $26.67 per clamp. Not too shabby.