First, the disclaimer... I have no connection with Harbor Freight other than as a (very) occasional customer.
I got a spam email from them yesterday and hot footed it down to the local Horror Fright store lickety split.
They've got EIGHT INCH C-clamps on sale for TWO BUCKS EACH. I bought a case of twelve for twenty-six bucks including tax. These aren't high quality drop-forged jobs, but entirely suitable for amateur boatshop work. At this price, there's no excuse to ever borrow clamps again. I have a bunch of sixes, but usually the eight inchers are way more expensive.
This is an internet coupon offer titled "Dollar Days - July 8-18." The clamps aren't listed on their website ad, but were listed with a download coupon on the "preferred customer email list" ad they sent me. (You can sign up for that on the website) I pulled it up on my iPhone and they gave me the two buck price, even though I hadn't printed out the coupon.
Usually, anything Horror Fright sells that has moving parts is probably unreliable, but every now and then, if you follow their ads, you can hit pay dirt.