Originally Posted by Incarnadine
Supply has vastly outstripped demand right now. UD and Rittenhouse just keep pumping out set after set. I think between them they have something like another 6 or 8 releases announced. Complete overkill.
I'm just glad I sold off my sketch collection before it got really bad.
This is the main factor. But supply by the individual artist is also significant. Anthony Tan and Charles Hall are great examples.
Your safest bets are those artists who do the occasional set (or only a few ever) with a strong demand/awesome talent.
Aggregate sketch card values declining is not new... it probably started sometime in 2010.