Hi,
I'm assuming you're talking about this record:
http://www.shmax.com/product_details/1488/optimus_prime_wing_saberPrices do fluctuate over time, but I see that there's something up with this record.
What happened here is that sometimes eBay sellers add things to their item titles (in order to get more hits on eBay) that may give us some inaccurate results. In this case, the addition of "G1" caused one auction to be omitted:
http://www.ebay.com/itm/TRANSFORMERS-G1-CYBERTRON-GALAXY-FORCE-OPTIMUS-PRIME-WING-SABER-COSTCO-EXCLUSIVE-/300771811122?pt=US_Action_Figures&hash=item4607659f32Sold for $198.50...much better than $35.
That $269.99 BIN (and any auction really) would only factor in if the item sells at that price.
Getting back to the $35...an item did sell at that price recently (20844677526), however, that's for a loose incomplete pair, possibly not even the Costco set, so I'm not sure why this would be reflected for a MISB version that's in your collection:
Purchased in Sealed condition on Sep 01, 2006 from retail, now worth $35.00.
Likely a bug...got any ideas on this one, shmax? The loose values also seem a little wonky.
MISB $35.00 $35.00 $35.00
Loose $215 $215 $215
MIKE
engledogg