斯里兰卡采购需求：网球发球机、网球训练机、篮球回弹机、篮球投篮机、羽毛球发球机、羽毛球训练机

I hope you're doing well. I'm reaching out to inquire about the pricing for the string machine you manufacture. I'm particularly interested in understanding the cost details, including any available options or configurations that might affect the price. It would also be helpful to know if there are any special offers or bulk purchase discounts available for different quantities. Additionally, could you provide information on the lead time for production and delivery? I'm keen to know if there are any warranties or after-sales services included with the purchase. Having all this info will help me make a more informed decision. Looking forward to your prompt response!