Uhh... only thing that matters by that point in the game is the Haste Helm, I think. You can only get two per run (one in a chest, and one by charming the baby Lavos), so if you can actually re-acquire the one in the treasure chest by revisiting the Black Omen in different time periods, that might be worth it.
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Yoblazer: http://i44.tinypic.com/5nw45i.jpg
Watch and you'll see... someday I'll be... part of your world!