I have the opportunity to buy more PCGS 69 Reverse proofs for around $245 each. What do you guys think. Is this a worthwhile investment or is it better to stick with the 70's? Ebay shows them between $250 - $280, so it's a good price compared to those, but I only have so much $ to spend and am debating between these or another PCGS 70. (I got in on the original mint deal for $300/set, but I just really like these coins and want more.)