言い値 asked price●price asked●seller's price

言い値〔先方の〕 asking price

言い値で at the price you name

言い値で買います,/いくらでも払います Name your price.

言い値で買います,/いくらなの,払いますよ Name the [your] price and I'll pay it.

言い値で売る get a fair price