In relation to this thread, I've thought it would be a good idea and useful for us to open a new one trying to collect all the information about the non specific MSX hardware that features the same components or devices compatible with the MSX standard. If we have the chance to buy one of these products at reasonable price we could access to a source of hidden MSX hardware like chips, mouses and use them as spare parts. Yes, we know that there are still original parts like VDP, soundchips, etc on sale but who knows in near future... Please feel free to complete or fix the next information:
Sony HB-A5000 and HB-A5050 Electronic Sketch Pad (V9938).
Sony HB-A5700 and HB-A5710 Electronic Sketch Pad (V9958).
Sony HB-B7000 and HB-B7070 Animation Computer (Z80+V9938).
Sony XV-T33F Video Sketch Titler (Z80+V9938). More information related here.
Sony XV-T550 Multi Video titler (MSX2 hardware based+Sony MOS-2 mouse).
Sony XV-J550 Multi Video titler (Sony MOS-1 mouse). It is the Japanese version of the XV-T550.
Sony XV-J770 (Z80+V9938+Sony MOS-1 mouse).
Sony XV-J777 (Z80+V9938+Sony MOS-1 mouse).
Roland MU-1 Mouse (Same as Sony MOS-1, Philips SBC 3810 and Panasonic FS-JM1). More information related here.
Roland DT-100 Digitizer Tablet (Same as Philips NMS-1150 Graphic Tablet). More information related here.
Panasonic VW-KT300 (V9958+Z80+Panasonic FS-JM1 mouse). More information related here.
Pioneer UC-V102 (MSX hardware based + MSX keyboard same as Mitsubishi ML-G3, ML-G30, ML-G30MkII).
There are some devices that need to be confirmed such as Victor JX-T500 and JX-T800 Video Titler (they probably feature Z80+V99X8), Sony XV-T600... On the other hand and as far as I know, the FM-Towns computer joysticks and mouses are also MSX compatible.