The best time to build your collection is in the Buy one get one free offer that usually appears about 3 times a year. we've just finished it and work and in the build up to xmas they we have them again.
On the situation of pinnochio, We have only had it a few times over the years and as soon as it turns uo it goes and we never get anymore.
You could probably get it on ebay but the price would be massive
And to the poster that asked about Snow white, When the Disney DVD rep came in to see as at work, she said they know which ones that will be re released about a year before they actually are. (She told us about sleeping beauty 9 months ago)
She told us about the Tinkerbell film which i'd seen posters for at DTD when i was there, something to do with the little mermaid and Snow White,
But like i said this could be another year. When I see her next I'll ask her what she knows hehe