Do you lose Travelers weapon at level 25? Can you get it back if you delevel? Do all of your toons lose ability to exchange (upgrade) weapons and armor when you hit 25? Can you get it back if you delevel?
You keep it. You lose the ability to upgradw with the normal shop sellers. But you will be able to upgrade D and C wearpons with merchant of mammon. Dont think that's the traveler's wearpon is upgradable, thoe.