Onchest trade block has 8 slots - 4 for payment setting and 4 for goods.
Left click on slot will set the same item in it
next left click will with the same item will just add amount
left click with "empty mouse" will clear the slot
right click on non-empty slot will divide by 2 stacksize

Left column is for price, right for goods
Name of the trade block owner is written in the top of GUI
Only the owner can change slots
Goods are taken from the chest under the trade block(it can be trunk as well)

Use "MESHES_RENDER_DISTANCE" in config file to set radius in which client will render models of items on the
trade block

Trade block model by MOTOR_plus

Done:

• ignoredAttributes for itemstacks compare
• show models of the goods on the trade block
• ignoredAttributes for itemstacks compare
• show amount of goods left in the container

Need to be done:

• limits for buy/sell for every set trade
• trade block which will allow to set goods' source containers around it(not only chest under the trade block)
• hardcoded GUI strings move to lang file
• select price item by id/code input