I've been playing with Ebay to see I'd I can get the cartridges I want for
half price. It took two weeks and bidding in at least 12 of this one, but
I finally got my $40 cartridge for $17.
I so, so, so adore this cartridge. It has *tons* of interesting pets. Guinea pigs, lizards, snakes, hedgehogs... a tarantula! Pretty much any pet you don't need a special zookeeping license to keep in your house. :)