No, seriously, if they are functional they are worth thousands of dollars. Any further details you might provide will help with the sale - mobo revisions, accelerator types - what 060 is in the A4000 most importantly, any expansion cards etc.
As the others said most importantly at the moment check the batteries on the motherboards and if they started leaking remove them - just breaking them off is enough for the moment. They can cause some heavy corrosion to the motherboard tracks.
Generally speaking it is good you are checking here before sale, because while Amibay is definitely a better place than eBay to make sure the Amigas go to a good home it is not an auction site so you will have to state a price when you sell your HW there.
