Unable to complete Thieves Guild quests/achievement when selling the armor given to you

Thanks to a useful post on Yahoo! Answers, I realized there's actually three sets of Thieves Guild Armor you can spawn through the console, and the UESP is listing the wrong one. The ones you want are as follow:

player.additem 000d3ac2 1
player.additem 000d3ac3 1
player.additem 000d3ac4 1
player.additem 000d3ac5 1

I've just confirmed it working. The ones the UESP list aren't visible in inventory view (they do show up in the world, though). I suspect they're meant for NPCs, since many NPCs carry invisible-from-inventory armor. Being different armor, it won't work with Tonilia's quest.

For completeness's sake:

00036584 - Armor, NPC version
000d3ac3 - Armor, Basic version
000d3acc - Armor, Upgraded version

00036583 - Boots, NPC
000d3ac2 - Boots, Basic 
000d3acb - Boots, Upgraded

00042be9 - Glove, NPC
000d3ac4 - Glove, Basic 
000d3acd - Glove, Upgraded

00036585 - Hood, NPC
000d3ac5 - Hood, Basic 
000d3ace - Hood, Upgraded

Windhelm, Markarth, Solitude and Whiterun all have "influence" quests that each become available once you've done 5 of the randomly-generated jobs from Vex and Delvin in that city. Since jobs in Riften or cities you've already completed do not help your progress towards completing the influence quest, you can save before taking a job from Vex or Delvin and then reload until you get a city you haven't completed yet, if you feel so inclined.

Completing the influence quests unlocks fences in Markarth and Windhelm, but most importantly, each influence quest you complete increases the available gold pool of all fences in the world, up to 4000 once all quests are complete.

When you've completed all four influence quests, plus the main Thieves Guild storyline, you can become the guild master, receiving a significantly-upgraded suit of the guild armor you gained when joining.