Here is my suggestion, a 'Discontinued Gear Vendor' on fleet for when KotFE hits. Now, this is under the assumption that with KotFE, and with all Operations being raised to level 65, that all of the previous gear would disappear such as Massassi, Revanite and so on. Even the old L55 token exchange vendors, would be useless as there would no way to obtain such tokens anymore with the level raise.
Therefore, the vendor I had in mind would house all of those discontinued items. For example, you want that Kell Dragon/Underworld/Verpine jacket for Imperial Agent, something that I believe most people find attractive as far as looks go? It would be in the vendor for an amount of credits. Perhaps as an empty adaptive shell, or with the set bonus/modifications still inside of it. I would suggest the current tiers that we can obtain currently, such as Dread Forged, Underworld, Verpine, and so on. Purely for the aesthetic or perhaps to help with gearing as a non-L65.