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

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

x203 x203
Kong the realistic
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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
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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
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
Total posts: 3
Unique posters: 3