In my time with Anker I’ve never seen a discount on the Bolder range.
But if you’re after a great torch for a little less than normal price consider Amazon Renewed.
Currently the Renewed LC40 is available for £11.99 - non renewed version £15.99.
The Renewed LC90 is available for £20.79 - non renewed version £25.99.
I have the LC40 and had the LC90 and can recommend them both.