Digital Microsystems DMS-3F, DEC Rainbow, TS 1000

Hello, Does anyone know something about Digital Microsystems DMS-3F? I saw one today. It has a built-in monitor, 2 5.25" floppy disk drives, centronics printer interface, and 4 serial ports (?) for connecting terminals I presume. If it is worth collecting then I will haul it home. I also saw a DEC Rainbow. However, it is priced at $89.95--way more than I am used to pay. Does a DEC Rainbow worth this much? I picked up a mint condition Timex Sinclair 1000 though. I have been wanting to collect it for some time. Does anyone know the polarity of its 9V DC input? I don't want to risk damaging it by reversing the polarity. Thanks in advance for any information. George -- George Lin "Accelerating your business through Network Architect, MIS enterprise document managment." Documentum, Inc. (Nasdaq: DCTM) http://www.documentum.com Inet Fax: mailto:remote-printer.George_Lin@4.3.8.6.3.6.4.0.1.5.1.tpc.int My PGP Public Key for encryption is at http://george.home.ml.org/pgp.htm