Posted By:
hankronAccording to my old Standard Catalog, the $300 is less than their combined book value when the cards are cut.
It will all depend on how rare it is to find the complete box (perhaps with 1970s Hostess and Twinkies its no great shakes to find a complete box). In general, the complete box is considered something special and will receive a large (sometimes multiple) price over the cut cards. So, considering book price (from my old book) is $450 Near Mint for the 3 cuts (total for three), $300 for the Near Mint boxes would seem a more than fair price.