Selling equipment:
At the moment your only choice is to destroy your equipment if you don't use it anymore. Soon you will be able to sell this equipment. The money you get for this, will be calculated like this:

When you buy equipment, it will immediately lose a certain percentage of its value. Also, with every official game in which the equipment is used, it will lose a part of it's value.

Shop refreshing:
There is some equipment that is never bought, and this 'useless' equipment will now be removed automaticly. If a piece of equipment is not bought by anyone in a certain amount of time, it will disappear from the shop.

What will these changes mean? I don't know exactly as the details have not yet been released, but the only real benefit this will have is on the high priced equipment. Will we see less bargains in the shop now low demand items are removed? We will see...