Others may disagree ... but if it's the first one, I typically go BIN/BO and wait for a reasonable offer. Otherwise, if you do auction I would say start it at around the final sale price of some of the other mid-tier relics.
****** Always looking for JORDAN SCHAFER '08 BC and '09 TC color/ref autos! ******
Current sale thread: http://www.blowoutcards.com/forums/baseball-singles-buy-sell-trade/528982-fs-c-j-edwards-plate-auto-1-1-tribute-kershaw-patch-10-ttt-trout-27-more.html