The primary roadblock to completing a 1970 Topps baseball card set is acquiring Nolan Ryan's 3rd year card. It's taken me some time, but I finally found one for just over 11% BV, which makes it a perfect fit for my collection. If you've been paying attention to asking prices for lower-grade early Nolan Ryan cards, you'd probably agree that they aren't going for under 20% BV in any condition. With book values such as commanded by Ryan's cards, there's a hefty difference between it's cost at 10%, 20%, and 30% BV.
With the toughest card of 1970 Topps now out of the way, the final 6 cards missing from my collection should be a breeze. Except for Ron Santo's card, the rest of my missing cards are just commons from the final two series. Santo's card books at only $8.00, but is hard to find at even 50% BV. I may have to overpay a little for the last few at between 30%-50% BV. I'm anticipating completing this set before the summer is over.
With completion of the 1970 Topps baseball card set soon to follow, I will have completed not only 3 key sets from the early '70s this year alone, but all of the Topps baseball card sets from the entire '70s decade.