What is Kate Spade's sale pattern/schedule?

[hesitantbride]

I posted this on S&B and got no responses, so I am trying you, MM.

I've been watching a wallet for months now on the Kate Spade website. Ideally, I'd like to pay less than $100 for it. It recently went down by 30% off. I am anticipating it will go down to 50% off.

Do her sales typically follow at 30% then to 50% off pattern? Will it go any lower? I checked her most recent surprise sale and the wallet I wanted wasn't part of it. It was on sale at Nordstroms for 33% off, but it is no longer available there.