They sell to vendor for 1 to 3 plat and cost 24 to 30 plat to buy from vendor.
Info from Tinkering compendium.
Dimensional Hammer
This item will look like a Fine Steel Warhammer. The stats are:
1 Hand Blunt MAGIC ITEM, LORE ITEM
Attack: 30 Delay: 15 Weight: 0.5
Effect: Stun
Effect: Gravity Flux Charges: 5
Races: ALL Classes: ALL
Ingredients:
1 Metal Rod
2 Bat Wing
1 Functional Force Module
1 Small Power Module
1 Blackbox B Series
1 Gnomish Bolts
1 Metal Disc