I can't sell my cases and I don't know why CS:GO

[Helienthus]

Steam has not let me sell my cases and I have no idea why.

About a month or so ago steam started putting up this box where it said:

"Why is this option unavailable?

You must have a Steam purchase that is between 30 days and a year old with no recent chargebacks or payment disputes. Steam Support cannot remove this restriction."

I am not digitally savvy and this steam post is just confusing to me. I hover over the sell button and I can't sell my case. :(

Help please!

[Brujeira]

To keep your access to the marketplace you need to buy something from the Steam store once a year... $5 of something to be precise. If you don't then your marketplace access rights lapse - to get them back you need to make a $5 purchase and wait out a 30 day cooldown period.

(added by moderator)

It only takes $5 the first time, to un-limit the account. After that, any amount purchased will fulfill the requirement each 357 days.