Looks like the code for setting default prices on auctions broke when we lowered the fallback prices to 30c max and 20c min. It works properly when there's no history to base the prices on (that's when 30c-20c gets used), or when the prices are based on a previous sale in your personal transaction history (the max is 20% higher than the sales price and the min is 20% lower than the sales price), but in other cases it tends to spread the max and min further than it should. We'll get an update out to fix that soon.