Billy?

billy is one i saw once in shops, and never again. dont think ive seen him, used, for sale locally, unless it was a huge bulk that i skimmed over. whiff is another one i would call rare, they came out at the same time here, i think with the thomas/hector pack?
i recall i had a whiff in a single pack as well as the 3 pack, whereas billy only came in a 3? the single i gave to a friends son to help him come to terms with having to wear glasses.