1st year veteran reward soulstone (red) comes only as a stone once selected, it does not and has never come in token form. You must be in a safe place to claim it (either in a inn/tavern or your house). Once taken it is placed in your bank box of the character you chosen to collect it on. It is bound for that account, though any character on that accunt can use it.

So no, buying one from a vendor is only a piece of decoration. It will not work at all.