I seen some at Big Al's here in Edmonton a week or so ago. 
I was eyeing them myself as they were quite big.  

 The way their long neck reached to eat off a shell was interesting. They almost look like a big ugly slug with frilles on the sides. These ones were tan in color and were $29.99 each. 
They were neat to watch though. I guess I like the weird things. 
 
 