You really can't argue too much with the price on this set, especially if you pick it up used. Buyers should be aware that in this case, "box set" just means a box is involved. There is no extensively-researched and lovingly written booklet, or even the inclusion of discographical details. You just get the dics in cardboard sleeves with artist, song title, and publishing info--nothing more. And the 50 songs on the Rocksteady set would fit onto two discs no problem, but are for reasons of "box set-ness" spread out over three discs. Not much of a reason to hang onto the thing, once the tracks are loaded on one's iPod.
Now, none of this has anything to do with the quality of the grooves, which is high. Enjoy