I posted a file some time ago which had a lens database showing old Minolta, new Sony, Canon and Nikon lenses, and more importantly their prices.
I've taken that one down now as it is out of date and needed a few corrections. The principal changes are:
1. I've incorporated the three new Sony lenses and shown the recent price drops.
2. I've factored in the price of hoods in those Canon lenses where they arent provided.
3. I've moved some of the lenses around to try and better reflect their actually market positioning.
Lens Database as at Sep 07