发邮件给客户，请教他的意见

Dear Customer,

I am writing to seek your opinion on some product designs that we are considering. I have attached some pictures for your reference. Could you kindly let us know if you think these models would have a market and if the designs are good?

Furthermore, we would appreciate your kind assistance in supporting our business, as we have not been doing very well recently. We hope that with your help, we can improve our sales and continue to maintain a positive working relationship.

Thank you for your time and we look forward to your response.

Sincerely,
[Your Name]