Opinion on selling robot

I was thinking about selling my Newgy 2040 robot but Im not sure how much to sell it for... Everything is in pretty good condition. I only used it for about a total of 48 hours. I was thinking about maybe selling it for $400 dollars without balls but it comes with everything else the robot originally somes with, even the box. I wanted to sell it because I think the 2050 is way better. The random placement(I mean the "trying to perfectly line up the oscillation with the frequency") is making me pull my hair out. I know that it helps but sometimes doing drills once in awhile can help too. Anyway, you guys think this is a good/fair deal? Or do you guys think I should just keep the robot? Thanks!

berkeleydoctor wrote: I bought my 1040 for $200, I sold it for $185 shipped, and I used it for awhile. But mine was in mint condition (i.e. fully functional and not broken at all)

Mine is still fully functional too but sometimes it gets ball jams. Probably because I sometimes get a 38mm ball in there...