This is the price for a set of four. The yellow one is an older type and has the DUPLO logo instead of LEGO, but the functions are the same as the LEGO version, so it's a genuine product that can be used normally. There are scratches on the connecting part in the second photo, but it can be connected and attached normally, and it is not sharp, so there is no worry about children getting hurt. There are minor scratches, dirt, and signs of use. It will be sent in simple packaging via Yu-packet Post and will be delivered to your mailbox. Please understand that these are used items, there may be oversights, and the packaging is simple before purchasing. Window, door, house