I try to avoid the very expensive stuff, and shop carefully. Even so, I probably spend somewhere between $500 and $1,000 a year on supplements. I try to stock up on specials, and look for the brand that gives the best value when I shop for each item. Shopping carefully can save plenty. For example, many molybdenum supplements are only 150 mcg, so to get 1 mg a day I would need to take 7 of them at around 5x the price of the 1,000 mcg Thorne capsules. I take potassium iodide tablets rather than Iodoral, as Iodoral is around 5x the price(some claim Iodoral is better, but is it really worth 5x the price????)

What confuses me is trying to space the minerals apart, and when to take each of the supplements that I take once a day.
There are certain things that are controversial though, such as how much iodine to take, or whether to take calcium and magnesium together(my current opinion is to take just a bit of calcium with my magnesium, less calcium than magnesium).
Also cofusing is deciding whether to get capsules, tablets, or the bulk powder. I guess it depends how much I take, and the price of each. Certain things like magnesium ascorbate are 4x as expensive per gram for capsules than bulk powder, so I take the powder. MSM is close in price for powder or tablets, so I take the tablets. For small doses(like 1,000 mg or less) tablets ior capsules are more convenient than bulk powder, but for larger doses, the bulk powder is more convenient.