The in-game shop sells packs of everything at different times, shop usually changes weekly when update hits,so new items often available.
The Developers Kefir have stated Beta purchases will be re-credited too your inbox an coins replaced in coin total they keep records very detailed so spend as freely as your personal situation allows and you wish. If game resets your items even those used completely will return.
Items purchased from the shop will appear in your "Inbox" located in the shop menu.
Types of packages in shop
=== Packs ===