Stop arguing with people about prices, You constantly overprice things and are almost always wrong. So stop wasting yours and others time by arguing.
If in the last 2 weeks you have sold a fireblock for 300 diamonds. I will bow down and give you my iPad. It took me a week to sell a fireblock for 225 diamonds. Others have been selling them for 200 for like 2 weeks now. I got lucky.
Yesterday, I sold a fireblock to ShiningNova06 for 300 Diamonds. Where's the iPad You can ask her for proof