Dull Grey Ioun Stone (25gp)
Anything that can cast Message with a command word
Phylacrity of Faithfulness (1,000gp)
Anything that can cast Cure Minor Wounds with some kind of activation.
Ring of Jumping (2,000gp)
Potion of Wisdom - or as it's more commonly know, Liquid Will Save (300gp ea)
Ring of Counterspells - loaded with Dispel Magic (4,000gp)
Ring of Sustenance - amazing for melee types: longer watches, more overland travel in a day, etc(2,500gp)
Immovable Rod (7,500gp)
Staff of Size Alteration - locked door? What locked door?(6,500gp)
Anything that can cast Identify with a command word... stupid 8 hour normal casting time.
Quall's Feather Token: Tree - god these are so useful, I can't even begin (100gp)
Robe of Useful Items - who DOESN'T need a 10ft pit sometimes? Or a door.. or a window.. (7,000gp)
Steadfast Boots (6,000gp)