The trash can seems buggy and needs to be reloaded to put in another item. How about increasing the number of slots? When "Throw Away" is clicked, the item should be deleted, allowing a new set of items to be placed.

Instead of a trash can, establish a market value for low-tier items so people don’t degrade items in MP. For example, T1 items could have a lowest price of 10 coins from an NPC, increasing based on rarity. T2 items could be 15 coins. This way, items will be burned in your system instead of being trashed. Some players sell items at lower prices, leading others to hoard the supply. This suggestion will help maintain the market value of each item, similar to MMORPGs. Players can choose whether to sell items in MP or to an NPC instead of throwing them away and wasting energy.

If you're worried about bots, there are solutions available once the system is established. Coins are much better for bots to farm than Pixels. There is always a solution.

I want to add a new feature in market place where the player will not be able to set the prize into unreasonable by decreasing the reputation for every pieces of item of that player will sell.

It's very hard for non-VIPs and VIPs alike to earn coins in this game. In fact, there are times when Pixels are easier to earn. The market is always negative to the point that it's just better to sell raw materials than actually making products.

What's the point of making wine if you can sell the materials at a higher price?

Therefore, I suggest that there should be a minimum sell price limit for all products. This ensures that the price of a product is higher than the price of its materials.

Some people continue to harass on the market and it's hard to buy stuff, they intentionally to sell some stuff at 1 coin or very low than the real price. And it takes me tons of time to buy a thing. Because there's just their stuff and I have no choice for buying. Could you please make a feature that can limit the price to sell a product.

Example:

I think this can reduce the harass act and help some people won't lose their stuff because of selling the wrong price.

Thanks for your help and have a nice day ;)