S.T.A.R.T.
Overview
The P2W Vendor (or Transact 4 Victory in Praetoria) sells, for in-game currency, everything which players could spend real money on before the 2012 shutdown. It also offers access to some additional functionality. P2W Vendors are located in the tutorials, in the starting zones (Atlas Park, Mercy Island, and Nova Praetoria), Pocket D, and some additional locations such as replacing the jetpack vendors in Grandville and the Shadow Shard.
Wares
Inspiration Drops
For small inf fees, you can disable inspiration drops by type (eg accuracy, damage, endurance) or size, or re-enable ones you have disabled. You can also enable dual and team inspirations.
Prestige Enhancements
These 5 enhancements are free, but unique. Until level 21, these are some of the best enhancements you can use.
Prestige Powers
Attacks
You can select which of the 5 Origin Powers to have. (You may need to first Revoke the one you have, below.)
You can also choose from a selection of melee and ranged prestige attacks. These are free if you have fewer than three total.
Buff Pets
You can buy pets that boost your Resistance and Damage or Defence and Recovery. One is free, but if you want more than one, it will cost a million inf.
Just for Fun
100,000 inf: the Flying Disc and Snowball powers.
Sprints
Free: grants all the prestige sprints. Note that it cannot be revoked.