In my opinion when it comes to my health I do not put a price tag on it. I will only get what I believe is best.
I really like the Standard Process Catalyn(their multi) as they have been the easiest to digest and absorb for me. They really aren't that bad either in price. I pay around $30 for a bottle that has 360 tablets in it and that will last you 3-4 months depending on use. If you take it as it recommends then you will get a 4 month supply out of it. I take almost double what it recommends due to my heavy training load. You really must listen to you body as well with these types of products.
Ultimately good quality supplements are pretty much the same as anything else... you get what you pay for.