I live in Colorado, a short ways from Boulder. People down there are crazy and buy weird stuff which I end up buying from them for crazy low prices. It is just the way I roll.
I picked these huge geodes up for only $150. The couple I bought them from originally paid $500 each for them and that was pretty cheap. The purple amethyst one is worth ~$600-$1500 depending on the buyer and the orange citrine one is worth $500-$1000 depending on the buyer. I think the orange one will be towards the middle to higher of that range because of he symmetry and the purple one will be closer to $600-$800 because of the white inclusions in it, although it is unusually tall for one of these, which bumps price up.
If someone offers me $1000 for both I will take it though. Would leave them room to make money and will let me buy the pistol I'm saving for.
Hope this helped!