How much is my lightsworn deck worth?

It's worth $170-180. A lot of Lightsworns decks are worth a lot more due to Plaguespreader Zombie and a bunch of Synchros, but since you don't have those, you're deck is fairly cheap. Plus, JD went down to $40 each now, and a secret Charge is worth only around $10, because the new ban list weakened Lightsworns by so much. So, Lightsworns aren't worth as much as they used to be. I hope this helps!