Here's an interesting interview with Bryan Dwyer on NASDAQ Trade Talks, talking about the memorabilia side of the collecting industry, but I think, most all of what he says would apply to the card side as well. So even though many people think of REA as maybe more "collector" oriented, they recognize the investor and investment aspect as well.
https://www.youtube.com/watch?v=FnpGlMWlrOw