How much should i sell for?

i plan on selling a few things on ebay and i was wondering what price i should start the bidding. i am selling a replica st. louis cardinals world series ring that was given out during the game in which the cardinals received their rings. i wish i would have sold right away because they were going for over $100. now they go for about $50. i am also going to include confetti i picked up during the final game of the world series in which they won. i may also throw in a basketball sized piece of the old busch stadium. what price should i start for just the ring and confetti. how about with the stadium piece also? thanks a bunch