I don't know anyone using them, but they're probably on sale because they haven't sold well (tough market).....Good price for acrylic call though. Also, I don't buy calls without first blowing them.
I personally stick with the tried and true calls........Haydel DR-85 for most ducks, Tim Foiles Tundra Saver, & Tim Grounds Super Mag. Although, one of the cheapest calls I have is a Knight & Hale Magnum Clucker.....I've kind of customized it (acrylic barrel), but even at 20 bucks it's still one of my favorites.
What kind of call you looking for?