why are some of these kong products different prices from other products?

Contributor: x203 x203
Related to: 
Is it because of different sizes or something? I know one vibrates. Just being curious about the price difference. type in kong in the search bar and three of these come up
03/08/2012
Contributor: Rin (aka Nire) Rin (aka Nire)
Looks like there's some size variation, if you look at the toys' specs. Vibrating toys typically cost more, as well.
03/08/2012
Contributor: Sammi Sammi
They're all different. This one is Vac-U-Lock compatible, this one has a suction cup base, and this one has a suction cup base and vibrates.
03/08/2012