noun
Used in commercial contexts for a price offered by a buyer, often contrasted with 言い値 (asking price).
See also: 言い値
彼はその絵に高い付け値をした。
He made a high bid for the painting.
売り手は付け値が低すぎると言った。
The seller said the offer was too low.
言い値 is the seller's asking price, while 付け値 is the buyer's bid or offer.
Compound of 付け (tsuke, 'attaching' or 'assigning') + 値 (ne, 'price'). The exact historical derivation is uncertain, but the word has been used in commercial contexts for a buyer's offered price.