MMO Champion has reported that new "Specialty Ammunition Vendors" have been discovered on the PTR in patch 2.3. These vendors, Archer Delvinar and Marksman Bova, can be found in once empty structures in the Scryer and Aldor areas, respectively, in Shattrath City. Not only do they sell the best types of normal vendor ammunition outside of Halaa, but they also stock ammunition that has reputation requirements. Instead of running over to the Cenarion Refuge in Zangarmarsh every time you need to stock up on Warden's Arrows, you can now buy the same ammo in Shattrath.
The same vendors also carry ammunition that is currently only available from vendors in Honor Hold/Thrallmar and the Caverns of Time. Currently the cost of all the ammunition sold by these vendors appears to be tied to Aldor/Scryer reputation level, but still requires the specified faction requirement to actually purchase and use.
Of course, the best news is that these vendors also carry a new type of ammunition. The Mysterious Arrows and Mysterious Shells require revered reputation with the Violet Eye and provide 46.5 additional damage per second. A stack of 200 costs 1 gold without any price reductions from reputation.
Clearly these new items are meant to fill the gap between Adamantite and Timeless ammunition and help hunters that are tackling Magtheridon, Serpentshrine Cavern and Tempest Keep increase their damage output. With the new Adamantite Stingers also being added 2.3, hunters will have more options than ever before when choosing a type of ammunition.