Fishpond has them on sale at 25% off the RRP $24.99. This is the cheapest I've seen them.
Don't know how long this will last. - Looks like it's expired already!
This is a bargain, but on the downside, last time I ordered these from Fishpond it took them a month to arrive (they had to put them on back order) - so don't buy them if you need them in a hurry. :-|
"Hurry - Only 3 left in stock!"
LOL!