帮忙翻译成英文，谢谢各位

Question

收到您的来信了，
但是价格是不一样的，
你还需要付38.5美元，
你可以在网上再订购一个价值38美元的产品，
您多付的费用我送你一件圣诞礼物，
您认为可以吗？

Answer 1

Thanks for your letter. One thing to remind you that the price is different; you have to pay another $38.5. You may order another product, which is worth $38, online.Then you may consider that the extra fee is for a Christmas present.
Please tell me if this can work for you.
Thanks

Regards,
***

Answer 2

Have received your letter,
But the price is not the same,
You still need to pay USD38.5,
You can be on the net to order another value 38 dollars products,
As you paid the extra money,I'll send you an Christmas gifts,
Can you consider?

差不多这样！

Answer 3

Crisy's version is good.