Heyo,
If you have 1month of game time, you should try to get as many Vet "privileges" before your game time expires. In my humble opinion, i give you few items that i did when i was in the same situation few months ago:
Account-wide features:
- You can now unlock Allied Races, if you are curious to level someone, this is the time to do. You can't do it as a F2P.
- Unlock Mechagon. Ýou can't do it as a F2P.
- Buy flypath maps like Scouting Map: The Eastern Kingdoms Campaign. They are a bit expensive, 10k each item so you can just pass. Still a Vet privilege to be able to buy them.
Enchants and Gems:
- Get some Revitalizing Jewel Doublet. This is a BiS gem, only obtainable farming some shadowlands rep... or buying it at AH. If you are looking to level more than 1 alt, you can buy 2-3 for each character (I got a pair of them just in case i need them in a future. Who knows.)
- Buy the Legion enchants for neck (Mark of the Hidden Satyr / Mark of the Ancient Priestess / etc.) Buy them at AH, you can be days farming the Chaos Crystals in order to craft them. And as i said, if you are planning yo have few alts, its definetly worth.
- Same happens for some BFA enchants like Naga Hide, Accord of Mastery or Accord of Versatility.
- I would say there is also a exception for Classic enchanting and its Crusader. I don't know if is BiS nowadays, but can also be a thing to consider to buy.
WoD Garrison Utilities:
- You can buy Frozen Arms of a Hero if you want to upgrade reaaaaaaaally fast your garrison followers. You can still upgrade them to 675 (max ilvl for a follower) but can take you weeks or months to do and this is a super-cheap item in AH.
Other QoL items:
- This reagent bag Simply Stitched Reagent Bag is super cheap in AH (around 75g in my server). The biggest F2P reagent bag i remember has just 16 slots.
- You can buy in AH mount-equipement, but you can still craft it. Anyways, you can consider to spend a little bit of gold, you could save time in a future.
But personally, despite the "pure vet" revitalizing jewel doublet, the biggest difference goes in:
Get the Infinitely Divisible
Ooze on a strength-based character.
- As you may know, Infinitely Divisible Ooze is a broken trinket that reduces massively the time you need to make a dungeon run. The bad part for a F2P is that if you play a strength based class (warrior, paladin or DK) you can't get this item. BUT if you are a vet, you can make use of the trade option, and group up with another level 20 friend who has access to the drop of the Ooze and just trade it to your toon. Remember that once your game time expires, you won't be able to trade.
Im 100% sure that there a more QoL items out there, but thoose are the ones i remember.