About a year ago, Rockler had an e-mail special of 50% off the 10 inch Jorgensen cabinet clamps (wooden ones). They were selling them for about $8 or so. I ordered 8 of them, within an hour, I got an e-mail that they were all sold out.
This left me with a bad feeling for them & I never order anything from them unless I can't find it anywhere else - which is seldom the case.
The good news (for you) is that Amazon currently has the 24/40 Bessey on sale for $125 and you can apply the $25 off $125 coupon (check around if you don't have one) & with free shipping, your net cost is about $100. I bought this set at this price last week with no problem about "running out of supply".