Sorry, was on business trip last week and got behind on email. Yes Dynadot has a backorder service. We catch CA, as well as about 100 other TLDs.
https://www.dynadot.com/market/backorder
Yes we have a lot of sales here: Domain Sales - Save on Registering, Transferring and Renewing | Dynadot
Also you can contact your account manager if you need a special deal. We can ask the registry for you.