A lowball is the opposite of overpay. Where overpay asks for more than market value, a lowball offers much less. Every trader gets lowballed. Post a skin for sale, and within hours someone will offer half. Some lowballers are testing the water, some are running bots that spam low offers to hundreds of listings, and a few are simply rude. None of them are obliged to pay fair value, and you are not obliged to accept.
Why do lowball offers work sometimes?
They work on people who need money now. A seller facing a bill will take 60 percent today rather than 90 percent next month. They also work on people who do not know what they own. A player who got a rare pattern as a drop may not know it is rare, and a lowballer who does can buy it cheap. Finally, they work on illiquid items. If a skin has been listed for months with no interest, a lowball starts to look like the only real offer.
Instant-sell buttons on marketplaces are a formal version of the same idea. The site pays you now, below market, and resells later. That is a fair trade of speed for price as long as you know the discount. The problem is the private lowball that pretends to be a fair price.
How do you avoid selling for a lowball?
Know the real price before you list. Check recent sales, not just listings, on the Steam Market and on a marketplace with public price history. Look at the highest buy order, because that is the floor a real buyer will pay today. Then set your own minimum and ignore anything below it. If nobody meets your minimum in a few weeks, the market is telling you the price is lower than you thought, and you can adjust on your own terms.
Never let a lowballer rush you. Pressure lines like "offer ends in ten minutes" or "I have another seller ready" are sales tactics, not facts. And remember that a skin in a Steam inventory costs nothing to hold, so waiting is always an option.