[djohn]

It really depends on how you plan on selling (i.e. eBay, Craigslist, Beckett, card show, card shop, flea market, yard sale, etc), and how quickly you want to sell everything. The quickest method would be to sell the whole box. To get the most money back you could sell packs, but that will probably take longer to sell them all. The only recent sale on eBay was $78 (including shipping), however BBC Exchange has boxes for $150 a piece. If you want to sell online, your best bet will be to sell the whole box. If you are going to sell at a flea market or yard sale you will be better off selling packs. If you are going to sell at a card show or shop, then you will probably be better trying to sell the whole box and if anyone asks about just buying a few packs then you can make that decision.
Overall, if you have some time you should try listing the whole box for sale with the option to entertain offers for packs. You can judge by the response what will be best for you.
Personally, I would just list it on eBay with a starting bid of $100 and see if anyone bites (listing it would be free, so if no one buys it you won't be charged anything). If it sells then you did good, if it doesn't then I would consider the alternative selling options I listed above.