I bought an 8 oz. bottle of 808 Protectant for about $8 at the Kaheka Daiei/Holiday Mart. The larger size was $14. The 8 oz. bottle looks like it'll last awhile. So far, I've only applied it to the steering wheel. It seems to work very well.
I finally got around to trying the 303 Protectant this weekend. I did the dash, console, interior door panels, and exterior black trim. also redid the steering wheel. It certainly works better than the old Armorall stuff.
I'll keep an eye on things and report back after some time has passed.