Hi i have the chance to get one of these Brandnew for $120 delivered are they worth it or just a heap of junk that no one cares about anymore ?
If you want to play Sega's first console games, then its a good alternative to an SG1000, as they tend to be expensive now. SC-3000 have RGB output too, which is a plus point over the SG1000 with its NTSC RF only. Have a look at the games available and see if they appeal, I really like Girls Garden and Monaco GP (which is nothing like later Super Monaco games).
I think the H revision has a nicer keyboard than the original SC3000, some people care enough about the SC3000 to create a multi cart for it. (http://www.sc3000-multicart.com/)