Shop

As of Beta 1.8.2, there are currently 16 (2 unobtainable) pickaxes in the game. You start the game with a Basic Pickaxe.

As of Beta 1.7.1 there are inventory slots. You begin with 25, but you can expand it.

Inventory
In the shop you can purchase extra inventory slots. These will have a base price of 5 Pyrite and $500 Money. The price will increase by 1 Pyrite and $500 Money per purchase.

Unobtainable Pickaxes
The only unobtainable pickaxe right now is the Admin Pickaxe. Only MrCheezyPig and Dingbat567 have access to this pickaxe.

The Glacialite Pickaxe was added in Beta 1.6.2 and replaced in Beta 1.6.4 by the Glaciatite Pickaxe because dingbat ruined the economy with it.

The Wormite Pickaxe was removed in an unknown Beta version. It could be obtained by crafting it with 30 Wormite and $9.000.