The only vet reward worth taking is a soulstone.
Insert "with your played accounts" between "taking" and "is", and you'll be exactly right.
Everything that isn't account bound is best bought from someone else (or gotten yourself) using an account that isn't being played actively, but is instead only being used for holding a house, BOD collection, storage, etc. Especially things like a single commodity deed box, and deco you just can't find for sale. Ethys and everything else are just too easy to buy from people doing IDOCs.
After all, Soulstones on an account that only exists to give you multiple homes are like teats on a boar.