美国采购需求：底盘零件、挖掘机支重轮、挖掘机履带、弹簧回位、抓地齿垫、Roker 转向架

I'm interested in purchasing some of your products and would like to know the wholesale prices for them. Could you provide me with a detailed price list or any bulk pricing options available? It would be great to understand the minimum order quantities and any discounts that might apply for larger purchases. Additionally, if you have any current promotions or special offers, please include that info as well. I'm looking forward to your response so we can explore potential collaboration and establish a fruitful business relationship. Thank you!