M's_Fan, if you look up SMR, 1979 OPC Gretzky PSA 10 sold for over $80K, and the Topps version sold for over $25K. From my source, the Tom Seaver Pop 1 PSA 10 was sold for over $100K few years back. The bottom line is, since it's the best or the 2nd best card, you can pretty demand the price. There were many private sale, and some of the numbers i heard are astronomical.
To answer your question, i posted on ebay because
1. curious what kind of offers would receive (so far the highest is $21,500)
2. show case the card. Call it vanity, since my wife doesn't approve my investing in BB cards, i can only share the fun with the rest of you

3. perhaps Pete Rose himself may buy the card now for $100,000