Thirty or forty cents is about as well as you'll do for straight culls so far as I know. If you separate culls into the best to the worst then you can get 50c each for the best but these will account for only about a quarter or a little more of the typical batch of culls. You can get more total price by separating these and finding the highest buyer for each category but it can be a lot more work.
Time don't fly, it bounds and leaps.