I honestly do not believe you can buy a mint/mint set for book value.With grading these days a person can get more than BV for one card from that set if it is a true mint card.There was a Bob Gainey RC that sold in the last year or so that went for 4 times the BV of the set.And with all the interest recently in vintage in high grade I am sure that the same Gainey rc would even do better if offered up for sale today.That set is one of if not the worse set OPC ever put out for centering.And if you can find a mint/mint set for BV than you really have a find.Good luck with your search.