Once you start chapter 2, you will end up in the city with the mayor and stuff. Go to the pier where the mayors boat is. There is a grey building next to the pier.go inside there and you will see a bunch of crates leading to a chest, open it and you will find a speed ring. Now, go to where you entered the city and go to the store that sells weapons. When he ask you what you want to do, choose sell and sell you'r speed ring. He will then say "thats a nice ring. I'll sell it to you for 900 coins. Put yes.