Has anyone looked at the Concept X market value lately? I happened to see they are at or above the $1k value on eBay. This caught me by surprise as I checked eBay shortly after I bought my from a shop and saw at that point (18 months ago) you could pick one up for between 350-450. Just wanting to know if the price now is legitimate....because if so, I may need to retire my CX-01 to the appreciating collectibles. :) Thoughts? Thanks!