[Translation from Japanese to English ] I'd like to suggest that, in order to get an email address, will you buy one ...

Original text

ご提案なのですが、メールアドレスを入手するために、私の出品リストの0.99ドルのギターピックをひとつ買って頂けないでしょうか。
そこで入手したメールアドレスに請求書をお送り致します。
金額は商品代金、送料、手数料併せて1520USDでいかがでしょうか？
お返事お待ちしております。

Translation / English

I'd like to suggest that, in order to get an email address, will you buy one of guitar pick at $0.99 on my listing?
I will then send an invoice to the email address I obtained there.
Regarding price, how about 1520USD including the amount of item, shipping charge and handling fee?
I'll be waiting for your reply.

Translation / English

Here is my proposal.
In order to get your email address, I would like you to purchase a guitar pick for 0.99$.
I will send you the bill to the email address.
The total amount would be 1,520$ including service charge and shipping cost.

I look forward to your reply.

Translation / English

This is my suggestion though, maybe you could buy a 0.99USD guitar pick in my lists for I get your mail address?
Then I will send you an invoice to the e-mail address that I got.
As an amount of fee, how about 1,520.00USD including Item price, postage and commission?
I am looking forward to hear from you.

Translation / English

For getting the email address, I'd like to suggest that you buy a $0.99USD guitar pick on my products list.
Send an invoice to the email address that you get.
The products price, shipping and handling charge add up to $1520USD. Is that OK?
I'm looking forward to your reply.