塞尔维亚采购需求：畅销办公椅、透气办公椅、游戏椅、办公椅、游戏桌、高背游戏椅

I'm interested in your ergonomic office chair and would like to request a sample to assess its quality and comfort. Could you provide me with the necessary steps to place the order? Additionally, I'd appreciate details on the shipping costs to Serbia and estimated delivery time. Once I have this information, I'll be able to move forward with the purchase process. Thank you for your assistance! Looking forward to your prompt reply.