Don't get shoes with a thick sole. Padding is BAD for parkour. Don't buy anything with the name "air" in the title.
ohh, I didn't realize the Darts were Airs. So what cheap pair of shoes should I get? cause right now all I have are skate shoes.
Welcome to the f#cking internet.
Thick sole doesn't really matter if you know how to land. New guys with thick soles will land flat footed because of the cushioning and that can mess you up.
If you want to refine your technique, a pair of shoes with thinner soles [or no shoes at all] is optimal. Just be safe because thinner shoes are less forgiving, obviously. If your technique is tuned, thicker shoes are fine as long as you don't use them as a crutch or excuse to try unsafe things.