Item Values: runes, pgems, charms, stones, statues, essences, etc

Sometimes it seems like people will just accept trades, "just because it sounds good". I often wonder if certain deals are good. Is there a "standard" for commonly used items used for trading? I know there has been a thread dedicated to rune values, basically

Ist as the "dollar" standard, but is there something similar for pgems, or other commonly traded items such as charms, world Stone shards, statues, essences or tokens of absolution? For example, how many pgems would an

Ist be worth? Are statues worth more than an

Ist? How many pgems would buy a statue?

I understand that personal value sometimes gets in the way and a buyer may pay more if he/she thinks its worth more, but the opposite is true as well, maybe the buyer thinks his/her item is worth more than it really is. Is there some kind of general guide that everything can be related to, perhaps pgems being the common denominator since it's the lowest valued traded item? Even among pgems, amethysts and rubies are generally valued more than the others? How does an

Amethyst stack up to an

Ist, or a statue?

I also understand that certain websites value things much higher than this one, but I do most of my trading here. It would be nice if there were some kind of "standard" for items traded! Anyone have something like this, or willing to put something like this together?

20 pgems equals

Ist, 1 statue set(or 2

Baal statue) equals 1

Lo(more or less). this is what I can tell you based off what I understand from your question

The market fluctuates too much for anything all-encompassing like this to stay accurate for more than a few weeks. Even more so for Ladder.