I saw two beastly looking yales in the hardware store the other day, they were dusty and down the bottom shelf under rows and rows of shiny brass lockwoods.
they were discouted to $25 from $50 so I picked one up 'cause the're re-keyable.
I put the key in and it wouldn't come out!.... eventually got it out after much yanking, then had trouble getting it back in.
had a closer look at the keyway and you can see from the front that it has serrated bottom pins! (I assume that it also has serrated top pins also and that the very act of puting the key in/taking it out may bind some of the pins.)
so that's the reason they discounted it - yale made a lock with so many security pins that it doesn't even function propperly.
I can't find a picture of it on yale's website so they must have discontinued it.