Why event inventory items can't be sold?

[kendysek]

Hello,

is there any reason why event decorations or unfinished buildings or some prices can not be sold? Even for zero coins? My inventory is overflowing! I have seen some requirements about our inventory, so it's the thing that interest lot of us. Or why the tabs in inventory are not working?

[tigagrr]

i agree and sometimes its not possible to put it in the inventory - takes place for nothing :(