Well it was time for me to start grinding rep, and I looked through our forums and couldn't find anything. So I went looking on google, and found very little; but I will post my findings.
Hyderad: Bastion (Veritas District)
Silvervine Branch: Friendly+ 1500 credits
Vale Starling Egg: Revered+ 1300 credits
Perfectly Spherical Fruit: Revered+ 150 gold
Endurance (4) and Max MP (176) crystals
Ring: Raises max MP by 153 and increases healing done by 5%.
Invalesco: Pathfinder Post (Val Tirkai)
Tirkai Grizzly Steak: Friendly+ 1500 credits
Cyasma-Infused Leather: Revered+ 1300 credits
Stiff Cowhide: Revered+ 150 gold
Power (3) and Critical Resist (5) crystals
Earring: Raises max HP by 3810
Valsekyr Hunt: Kanstria (Val Kaeli)
Cowl Harness: Friendly+ 3500 credits
Innerlid Leather: Revered+ 3000 credits
Soft Fey Hair: Revered+ 150 gold
Balance (3) and HP (2404) crystals
Ring: Raises max MP by 153 and collects 1.5% addition aggro on target hit.
Shariar: Zulfikar Fortress (Helkan District)
Supple Noruk Leather: Friendly+ 1500 credits
Leadership Plume: Revered+ 1300 credits
Downy Struthio Feather: Revered+ 150 gold
Impact (2) and Critical Chance (2) crystals
Ring: Raises max MP by 153 and inflicts an addition 1.5% damage on target hit.
Velika: Velika (Velika)
Morpheutic Draught: Friendly+ 1500 credits
Chebikan Cotton: Revered+ 1300 credits
Popri Moppet: Revered+ 150 gold
Attack speed (1%) crystals
Nexus: Zulfikar Fortress (Helkan District)
Elderitch Leather: Revered+ 3500 credits
Fire-Kissed Ruby: Revered + 3150 credits
Inflict more damage to players (2%) and reduces damage from players (4%) crystals
Nexus also has Tier 12 (Favorable) and Tier 13 (Friendly for , Revered for gold) armor and weapons sets.
Note: All earrings and rings from the reputation merchants are item level 147, have one crystal slot, and two unidentified effects.
Suspicious (3,000) > Wavering (9,000) > Neutral (12,000) > Favorable (15,000) > Friendly (20,000) > Trusted (25,000) > Revered (Max)