Why Are Current Players So Over-priced?

It is shocking how over-priced certain cards are of today's players. For instance, just reviewing eBay's most recent closed auctions, I see that a David Ortiz 1997 Fleer Ultra rookie card (not PSA graded or anything) has sold for more than a near-mint Hall of Fame-worthy player rookie cards 1972 Topps Carlton Fisk/Cecil Cooper, 1974 Topps Dave Winfield, 1975 Topps Robin Yount, 1979 Topps Ozzie Smith, 1982 Topps Cal Ripken, Jr., 1983 Topps Tony Gwynn, 1985 Topps Roger Clemens, or 1986 Topps Traded Barry Bonds. (Yes, yes. We all believe Barry Bonds juiced.) Now, I like David Ortiz. He's a great player of the recent years, but he is at best questionable for the Hall of Fame and is very unlikely to make it at the rate his stats are declining. Given this, why can his cards outsell these other cards which likely have equal or lower volume out there? (And don't even get me started on why a Phil Hughes autograph can outsell a Warren Spahn!)

I get that the economics in play here -- supply versus demand -- David Ortiz has much higher demand than a Carlton Fisk, but really? There are how many Ortiz rookies out there and just one variety of the Fisk rookie.

This Ortiz card does remind me of another. The card lists David as "David Arias". What's the story there? I get that his name is David Americo Ortiz Arias, but why did his name get screwed up on the card? Anyway, the card this reminds me of, which has nothing to do with this is the 1963 "Pedro" Oliva rookie card. Tony Oliva was mistaken by the media for his 3-year young brother Pedro (possibly intentionally as lore would suggest). Topps issued a rookie card in 1964 for "Tony" Oliva, the (correct) name to be reported moving forward.

For the record, I am investing in current and future hall of famers to fill out my collection. David, love ya and miss you as a Twins fan, but I'll come back to you when the price meets my demand.