Vintage 70's - Technics Stereo Cassette Deck RS-640US Recorder Mixer

One of the most hiphop-looking cassette units in the world. A machine praised for it's ability to transform mixes and especially drum saturation into amazing results.
I've used this machine for production and recording. It works, plays and records - but it is due for a cleaning and an overall service and probably a new rim.
I don't have the time to service it myself so I'm selling with a discount, so you can either clean it yourself or afford to get it done.
The machine has a bit of cosmetic ware to it, nothing serious (see pictures).