You give me a crazy price, I know XX company who produce a similar product, they only give me 30% price as you gave

Dear Mr/Mrs,
I am so shocked you give me this target price. It's quite lower than our factory's cost price.Please do trust lower prices are always with reasons, we are all factories in China, we should not have so big price difference, in order to find out the reasons (I think you are also very interested), I would love to offer you the help with my professional product knowledge and experience:
1. You can try to collect the samples from us then you can find out the reasons by yourself.
2. Quicker Way: you can ask your supplier to send the samples to our forwarder's warehouse (As our factory address would make them hesitated), I promise I will compare the samples in the fair way and give you the report.