I used to buy my supplies, in bulk, from discount pet drugs. They give great prices for bulk items (3, 6, 9, 12 of an item -- and on feliway it really makes a good buy)

Check them out.... $12.99 for a single refill, the 3pack comes out to $12.50 a piece, the 6 pack is 77.99 . It's a good deal compared to at PetSmart. And if you order over 100.00 you get free shipping. It's not that hard to do if you buy in bulk to begin with.

Check it out Cyn!