Are you talking about what you buy in the Bazaar section?
Like if you sell this item and that, a new item will show up in the Bazaar?

If thats what you mean, its in the FFXII walkthrough, which I own.
I could type it up and send it to you if you wanted.
It shows which items turn into ______ after you've sold them, how many you need, what else needs to be sold, etc..