The best deals are when he does 10% off which is usually related to a holiday or an over-stock situation. Frequently the 'freebie' is rib hooks which I don't know of anyone using. The best freebies are probably the cover and chip-screen.
You should follow Smokin-It on Facebook as the sales and promotions get posted there and not on here, most of the time. Be aware there's more than one Smokin-It account on Facebook... one that is active and one that isn't. If you have trouble finding the active one let me know and I'll track it down for you.