Hi, thanks for the suggestion!
At the moment, you may find blocks like dirt and gravel to be expensive, which we can understand as it is early in your Skyblock’s progress. However, as you grow your island, so does your automatic farms and your ways of getting Skyblock coins. As this happens, you will get enough Skyblock coins to make these purchases. and these items will become cheaper relative to your balance later on in the game. If you use your coins now, you will get them back soon as you progress through the islands!
Dirt and gravel will remain in the shop so that you can use your coins to progress through quests rather than gathering them up and using them for something less useful!
If you have any more ideas, feel free to make another thread!