Hello, before 1.6 patch, the 100% mounts were unarmored mounts. After that patch, you could keep those mounts or turn them into the new ones we have now, but you could not buy them anymore.
Those old unarmored mounts are the ones used by battleground bots between lvl 40-59. I wish there would be a way to get those old mounts on the game again.
That could be from the store or from AH for high prices or from the regular mounts vendor.
I can make a full list of those mounts if needed.
Thx for reading.