How to evaluate a Steam trade before accepting

An exchange appears fair when the amounts on both sides match. In practice, this is the most expensive illusion in trading: two sets of items worth the same amount can be worth completely different things when it comes to selling.
Why “equal amount” does not mean equal. How to calculate both sides of a trade, taking into account liquidity, commissions and blocking, and where they most often lose.
Compare net proceeds, not displayed totals
The correct question is not “how much do the items cost”, but “how much money will I get if I sell what they give me, and how much would I get if I give it myself.”
The difference arises for three reasons at once. Liquidity: one set will go away in a day, the other will hang around for six months. Commissions: they are calculated for each item separately, and on ten cheap items the losses are higher than on one expensive one. Blocking: an item that cannot be sold for a week is cheaper than the same item that is immediately available.
A classic example is exchanging one expensive item for a pack of cheap ones for the same amount. Formally zero. In fact, you got a set that lasts longer and has a higher total commission.
Value both sides consistently
Bring everything to one currency and one type of price. You cannot count one side according to Steam, and the second according to the prices of a third-party site.
Check each item separately: full name, condition, float, pattern, stickers. Automatic exchange calculators take the average price by title and do not see valuable items - neither from you nor from your partner.
From each side, subtract the expected costs of sale: the site commission and the discount that will have to be given for the urgent sale of illiquid assets.
What remains is the real exchange numbers. Compare them.
- Check expensive exchange positions manually, not with a calculator.
- The exchange of “many cheap ones for one expensive one” is usually beneficial to the one who gives the cheap ones.
- Consider how long you are willing to keep what you receive.
When a trade is worthwhile
When you get more liquid for less liquid - even with a small additional payment on your part. This is a budget breaker, and it is often worth the interest.
When you receive an item that you really need for the game, but give away something that is just lying around.
When your partner has a reason to rush, but you don’t. Then the additional payment goes in your direction, and this is a normal market situation.
In all other cases, exchanging for the sake of exchanging is almost always slightly unprofitable - simply because of friction: commissions, spreads and time.
Warning signs in an offer
They're rushing you. Any urgency in a trade works against those who are being rushed.
The offer was canceled and a similar new one came. Stop and check the sender's permanent SteamID - this is the moment of substitution.
The partner shows the “site rating” instead of the items themselves. A screenshot of the evaluation does not replace the inspection of specific instances.
They offer to carry out the exchange through an intermediary or “guarantor”. There are no guarantors, there are only people who disappear with objects.
The composition of the exchange changed slightly at the last moment. Check each position before confirming, and not from memory.
Frequently asked questions
Why might an exchange of equal amount be unprofitable?
Items differ in liquidity, total commission on sale and blocking. The same assessment does not mean the same money at the exit.
Can you trust exchange calculators?
As a rough estimate - yes. They take the average price by title and don't see float, pattern and the sticker, so the expensive items are checked manually.
Is it profitable to exchange one expensive item for several cheap ones?
Usually not. A pack of cheap ones takes longer to sell, and the total commission on it is higher.
What to check right before confirmation?
Permanent SteamID of the partner, the composition of the exchange in both directions and the fact that you started the operation yourself.
Is it worth agreeing to an exchange with an additional payment?
Yes, if in return you get a more liquid item or something that you really need. The additional payment for illiquid assets almost never pays off.

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