i always look at how many bids are in and at what price points (very important) vs how many ask (also very important) and finally last sale plays a small part. for instance i don't want to pay more the $325 but that means if i put that bid in right now for size 11, 80 people have to get there pairs before my bid is even looked at, and that's without taking into account anyone that gets impatient and throws a higher bid in from one they had in below $325. Then you have to look at how many ask there are and wonder how many are willing to come down, so will say everyone at $400> will be scooped up at =/<$325 but there's only 78prs at $400> so someone is sol, again this is just an example not a sure thing but it's how i look at it to see my chances of getting shoes i want