Not sure about the sage model...I thought "sage" was the model??? The sage is in good shape, and works. But for some reason the battery charging function is broken and it will not charge. If you put a charged battery into it, it works fine. The discovery is in pieces.
I will take some pics and post or send them to you.
Here's what I have: 1 discovery in pieces. 1 sage complete 3 batteries (there's 1 in the sage)..not sure how good any of these are still. 4 new dust filters 3 walls (1 new) 2 docking sattions 1 A/C adapter for docking station 2 remotes (1 new)
Sorry, I didn't see this earlier, but you can sell broken Roombas on Ebay pretty easily, though not for a lot of money. Just be honest and point out what doesn't work and you will very likely sell it (if you still have them)