from what i understand, the supplemental draft is kinda like ebay....theres no bidding for him....we say what pick we would give for him, and at the end of the day, whoever has the lower pick, ges him. Like a secret ballot

You're almost exactly right. Browns bid a Second and everyone else bids a 3rd then the Browns get him and they lose the second round pick for next year. Its bidding alright not like a regular draft (you wait your turn and take the player). You're bidding and doing a secret ballot. The one with the lowest bid gets him.