Best bet is study up on grading and determine the grades yourself. Or post clear pictures of some of the better ones for opinions here. While they are nice coins I don't see anything worth enough to justify having them professionally graded.
I have lots of Wheaties, there was a time I collected them , must have hundreds. Never sold any. Dont think i have any that are worth more then a few bucks though. Then again I haven't looked at them in years.
Get yourself the current "U S RED BOOK", you will be able to self grade the coins you think have any value. Proceed from there. Good luck on eating your WHEATIES.