[Translation from Japanese to English ] You paid $690 last time so how about I offer you a special price of $650 this...

Original text

前回は690ドルで購入して頂いていますので、今回は特別に650ドルでいかがですか？
もちろん送料はこちらで負担します。
もし宜しければ、Paypalで請求書をお送りいたします。
お返事お待ちしております。

Translation / English

You paid $690 last time so how about I offer you a special price of $650 this time?
Of course, I will pay the postage costs.
If this is O.K I will send you an invoice on Paypal.

I look forward to your reply.

Translation / English

You bought one before with $690 so how about $650 for this time?
Of course you don't have to pay for the shipping.
If you are okay with this, I will send you an invoice via Paypal.
I'm looking forward to hearing from you.

Translation / English

As you bought at $690 last time, I'd like to make a special offer of $650 this time, what do you think?
Of course I will bear shipping cost at my side.
If you'd like to accept it, I will send an invoice via PayPal.
I'll be waiting for your reply, thank you.