boba fett cardbacks - advice

MOC Boba always seems to command to dollars regardless of the cardback issue and he had a long cardback run for sw21 to tri logo what i was wondering is which cardbacks are considered the most rare and also which tend to be the most expensive? (aside from the sw21 back)

I recently picked up a nice c8 ROTJ 77BK desert sence fett for just £95! inc p+p (i have been waiting for a moc boba at the right price for years) how rare is this particular cardback? Also how many cardbacks issues did they use the alternative desert sence photo?

Cheers Jay

The desert scene is found on the:

65 back with emperor offer

77 back

79 back

To the best of my knowledge no desert scene (or space scene for that matter) card has turned up with an Anakin Sticker Offer on it.