Do you pluck them out of thin air, spend hours researching current trending prices for each item, throw a handful of dice, what?
I'm just curious as they say an item is only worth what someone is prepared to pay, but if I started all of my auctions at 99p I might be selling something worth far more but for 99p because only one person found it. I see people selling some of the same kind of items as me and their prices look really random, all over the place, sometimes in 20 items no two prices would be the same. If it's based on trending prices then how often would you update your prices to reflect the current trend (which might change daily or even hourly)?