I didn't include the prestige amount in the demand calculation, that's why the demand was messed up. I already fixed it and I will publish the next update next week. I would publish it this week, but I'm currently busy with the Brackeys jam.
But you can charge more for your items, just try to find the best price below 100% (Shown, but not correct) demand
Did you ever update this? Both the web version and the download version? Currently, I have a prestige boost of 892%, and "wood shelves" turns red if I charge more then 10, even when my quality is at 70 and rate at 16. That is significantly down from when I was able to charge 490-ish for the same quality and rate but a prestige of only 120%. If I charge more, my (unsold) "stock" starts to increase rapidly.
