I found a 28mm/1.8 for sale here, and I'm thinking of getting it (don't tell the missus). After doing some research it is rather tempting to pick it up. After all, who wouldn't want one of the highest resolution lenses ever produced? Besides, I still have Nikon bodies that need lenses The thing is, I can't find any reference for the value of this thing online. There are a bunch of them on ebay for $3k+, but I think that is obviously very overpriced. Anyone know the true market value for these things?