One suggestion I’d like to see here on the forums is a place to track the current values and going rates of rare items in-game. Right now, the best way to do so is to dive into the Trading tab, which is often misleading. It’s too easy for players who aren’t well-versed in the prices to get scammed. For instance, it would be nice to have a place to know whether a rare item goes for a few stacks, an SC, or a DC, without looking through old trade posts and hoping to find a recent price.
There have been lots of players who have compiled lists of the prices of rares, I've found one recent(ish) one that I've linked here: Skyblock Official Site | Skyblock The reason these lists don't stay prominent though is because the rares economy does fluctuate quite a lot and prices are very much based on supply and demand, which means its hard for the creators of these lists to keep them 100% accurate. But they are good for a general idea
Non-DP rares prices fluctuate a lot so a list like that would need to be kept updated every few weeks/months. For now, I'd suggest going around shops like ak2382, boarder02 or even mine . I'd say that's the best way to have an up to date pricing based on the actual economy. That's what I do!