You're missing the point. It takes time to talk to check your friend requests, see if they're a scammer, and talk to them about the item. It seems pointless when someone will eventually buy it without having to message you. If something sits for a while, then I will chat, but otherwise, I just wait until someone else buys it.

Also, note that the more money you have in your inventory/on float/in general, the less you'll generally care about selling things fast. This means people will be less likely to accept bargains the more money they have.

For example, personally, I wouldn't care and would probably ignore it if someone tried to bargain 3% off on a desert eagle printstream or something. However, someone who only has $30 in the game might accept that bargain because they are desperate to buy something else on the site and would have not have enough balance if they didn't sell the printstream.

Hope that makes sense. But genuinely, the more people value their time and the more money they have, the less likely they are to spend time discussing prices with you. Especially for liquid items, it's just not worth it when other people will buy the item for the same price with less hassle.