The Blink Barracks

The Blink Barrack is the cutting edge of war technology. The Blink Barrack from the outside appears to be a large circular tent with a radius of about 15 feet, and the interior looks like a standard base of operations for warring maneuvers, but the Blink Barracks has a special trick up its sleeve. It can teleport the tent and everything it contains up to a mile away every 20 minutes. Obviously this is not the fastest way of travelling, but commanding officers can continue to make preparations and plan out their movements while still continuing to travel at a decent pace. The Blink Barracks have also been used offensively in rare cases. When the barracks are teleported straight into other matter, it causes that matter to spontaneously combust now that too many molecules are crammed into one space. Therefore, the barracks can obliterate, or "telefrag" anything that it teleports directly into, including enemy soldiers, heavy siege weapons, or even the wall of a keep or castle. This can provide insane tactical possibilities, both offensively and defensively, as commanding officers can escape danger by teleporting away using the Barracks.
The Blink Barracks are most commonly manufactured in Ucrua, even though they are actually a magical item. This is exactly why The Order of Wizardry comes in second in terms of Blink Barracks exports and buyers.

Price

Can range anywhere from 500 GP to 1,000 GP, depending on the teleportation recharge time, which can range anywhere from 30 minutes to 10 minutes.

Rarity

Quite rare outside of military supplies, as they are usually only sold in bulk. However, they can be found on a many a black market willing to sell for a slightly higher price, benefitting from quite decent profit all the while...