I can't speak for Taro... but Taro is also
a real shop in Tokyo. Probably many of the cels
sold during the sale were old ones. In those
conditions, it sometime hard to keep an on-line
DB synchronized with what is sold at the shop.

(For the same reason, conventions are a real
pain : it's far too easy to forgot to write
down that you sold a cel and so should remove
it from the on-line DB)

Cheers,
Yann Stettler