連絡ありがとう。
確かに相手のオファーは私にとって残念なものではありますが、一方で物件の現状価値に対するあなたご指摘も十分理解できます。したがって、私はあなたのご提案通り、相手に対して1万ドルのカウンターオファーを出したいと思います。
お手数をおかけしますが、引き続き交渉をお願いします。
Inded the buyer's offer is disappointing, on the other hand I do understand what you pointed out for the current property value.
Therefore, as you poposed, I would like to counteroffer $10K.
Thank you for your continued support for negotiation.
The offer made by a partner is very disappointing for me.
In the meanwhile, I understand what you found about current price of the building sufficiently.
Therefore, I will provide the partner 10,000 dollar as a counter offer as you suggested.
I appreciate your work and hope that you continue the negotiation.
Their offer is certainly regrettable to me, however, I understand your pointing about the current value of the property well enough. So, I would like to give the counter offer of 10,000 USD to the counterpart as your proposal.
I am very sorry for taking your time, but please continue to negotiate with them.
Although the offer makes me disappointed, I agree with you about the value of the property now. Then, I will make 10 thousands counter offer what you suggested. I would like you to keep on negotiating, thank you for advance.