Longman Dictionary of Contemporary English
special offer
noun
EXAMPLES FROM CORPUS
▪ Having a special offer or promotion?
▪ It was reported, in Baberton Mains, that a special offer for the installation of burglar alarms had been made.
▪ Our special offer price is £25.75.
▪ This special offer is valid until July 31st 1992.
▪ Unless it's a special offer, companies aren't obliged to stick to the prices they display in their ads.