The best duck calls for the price are the all acrylic series called the: (look at images on Cabelas.com to see what each call looks like)Buck Gardner Spitfire Duck Call! 'spit tech'
This is the best call for the price and has any sound you need, and makes a great ringing sound too.
I can out call everyone i hunt with with my two green acrylic duck calls.
Black acrylic: $59.99
Green acrylic: $59.99
Cocobolo wood: $29.99
Anyone who wants a great acrylic call should look into these, because they are better quality than even the $100+ duck calls on the market. It has the sorta single reeds or the reed and a half as buck gardner
If you want to see his duck calls in action, and blown by himself search Buck Gardner
on You Tube.
Great customer service at Buck Gardner