Idea, Shop prices should fluctuate
This idea doesn't appear to have been brought up before.
Items in both of the shops should not be fixed. One possibility would be to add or subtract a random amount per item at the start of each game. I'd suggest from up to 25% of the current cost of an item. This would sometimes cause players to vary their DG build.
A second possibility would be to create a true market where prices increase or decrease based on how much they are purchased across all of the online games. This would be even more exciting than the first option as it should balance purchased items automatically.
To go along with either of these improvements, I'd suggest letting us browse items shops while dead. In fact we should be able to look at anything while dead.