EOS 5d accessories
I’ve got two items specific to the Canon EOS 5d (not the 5d mk II) and I no longer own a 5d.
Item one: a Really Right stuff B5D-L quick release L plate (see product page on Really Right Stuff website)
Item two: a 3rd party 1500 mAh battery pack for the 5D.
The QR L plate new from RRS is $140. One sold, used, on Ebay for $75 (see listing)
$50 + shipping for both.