Adding a used cassette deck to a recording studio usually means sorting through decades-old gear where condition matters as much as features. This Yamaha CMX100II is a specific analog-workflow tool, and the exact unit on offer has a few realities worth weighing before you commit.
Quick verdict
For USD 197, this used Yamaha CMX100II gives you a functional tape path: recording succeeds and playback outputs sound. It's sold as-is with visible wear.
Who it suits
This deck suits a studio owner who wants a cassette recorder for character-laden tracking and is comfortable caring for older gear - someone prepared for the power-adapter requirements and willing to give a used unit some service attention.
What stands out from the listed details
The unit has been tested: recording is successful, playback is outputting sound, EQ changes the sound, PITCH and TAPE SPEED both change speed and pitch, ZERO STOP halts rewind, dbx alters the sound, and MASTER output works in STEREO and 4-TRACK modes. With four line inputs and a desktop form factor, it can sit neatly in an existing recording setup.
Meaningful trade-offs
The included PA100-J AC adapter is 100V, so a transformer is needed to use it in countries with a different mains voltage. The main unit has scratches, the manual shows creasing, and the test cassette is not included. Not every function has been fully verified, so maintenance should be part of the plan before you rely on it in a session.
Bottom line
If you're prepared to handle the power-source and maintenance realities of a used Japanese-market deck, the confirmed features and tape-based workflow make this a practical choice. If you expect a plug-and-play recorder with every function verified, the caveats on this particular unit will matter more.
CMX100II YAMAHA Multi track Cassette Recorder Studio Gear Tested w/100V Adapter

At USD 197, this used Yamaha CMX100II offers a tested cassette recording path: recording succeeds, playback outputs sound, and EQ, PITCH, TAPE SPEED, ZERO STOP, dbx, and MASTER controls all responded during checks, with MASTER confirmed in both STEREO and 4-TRACK modes. The desktop unit has four line inputs. The included PA100-J adapter is 100V, so a transformer is required outside Japan. Condition notes include scratches on the main unit, a creased manual, and a reminder that not all functions have been fully verified - so maintenance before use is advised.