Worth dumping another $100 into a Sony TC-666D?

Is $450 USD plus shipping a good deal? 1960s Sony TC with sound to sound. First time post, TIA : r/vintageaudio

Tare-down: Sony TC-666 Tape Recorder (Reel-to-reel)

Sony 101 Reel to Reel Tape Recorder (B) ______ (sn-192289)

SONY TC-666D - Maison Robert

advances in marketing - Small Business Advancement National

PRICE 3500 (9310741161) SONY TC 44 TAPE RECORDER MADE IN JAPAN

What type of equipment is needed to patch a phone into an audio mixer for calls in shows? Is a special phone needed? - Quora

I want to buy a cassette tape player specifically to play heavy metal music on. Can you recommend any good cassette players for me to buy? - Quora

HiFi Stereo Review 1979 04, PDF, Amplifier