818 Agreement to sell at valuation, Ch. 31. No. 9.] Sale of Goods. agreed, or may be determined by the course of dealing between the parties. (2) Where the price is not determined in accordance with the foregoing provisions, (he buyer must pay a reason- able price, What is a reasonable price is a question of fact dependent on the circumstances of cach particular case. 11. (1) Where there is an agreement to sell goods on the terms that the price is to be fixed by the valuation of a third party, and such third party cannot or does not make such Valuation, the agreement is avoided. Provided that if the goods or any part thereof have been delivered to and appro- priated by the buyer, he must pay a reasonable price therefor, (2) Where such third party is prevented from making the valuation by the fault of the seller or buyer, the party not in fault may maintam an action for damages against the party in fault. Conditions and warrantics, 12. (1) Unless different intention appears from the terms of the contract, sUpulations as to time of payment are not deemed to be of the essence of a contract of sale, Whether any other stipulation as to time is of the -ssence of the contract or not depends on the terms of the contract. (2) Inacontract of sale month = means primé facie salendar month. 13. (1) Where a contract of sale is subject to any con- dition to be fulfilled by the seller, the buyer may waive the condition, or may elect to treat the breach of such condition asa breach of warranty, and not asa ground for treating the contract as repudiated. (2) Whether a stipulation in a contract of sale is a condition, the breach of which may give rise to a right to treat the contract as repudiated, or a warranty, the breach of which may give rise to a claim for damages but not to a right to reject the goods and treat the contract as repudiated, depends in each case on the construction of the contract. A stipulation may be a condition, though called a warranty in the contract.