100% there are resource limits to most things. For most of these limiting items it seems that somewhere, someone either has an effective way of collecting them or is willing to put themselves through the grind to collect and will sell them.
Sometimes you’ll find a shop selling things no one else sells, other times you might have to put up a basket or advertise that you’re looking for X here or on discord.
Thing is, as much as i hate these bottlenecks, it helps to create a market for players to het/make them. My crafter can craft almost every recipe, but I’ve never made a coil in my life. I find it more worthwhile to mine fibrous (from foliage) and re-sell it then buy a coil from one of the few dealers stocking them.
As for market value… search and research. Run around, go shop to shop, make your own price list of who sells what cheapest or where to get the most coin for what you’ve gathered. I’ve seen earthyam stew for sale at 17c cough in one store, then on a different planet 2 portals away someone is selling them for over 70 each… I’m not saying either is right, wrong or necessarily sustainable, but I’ve seen the expensive one sell and the cheap one isn’t out of stock. Lesson - the more you know the better you can judge prices. I also feel that this disparity is important for small shops and that a universe wide price board may negatively impact the game.
Lastly as @Sulfurblade said, you kinda build a crafter out the box because you need stuff crafted, theres a whole new world to be explored once you get an alt going for mining, hunting, building etc. And this happened to me at about lvl24 too.