As far as non arranger keyboad instruments, I've owned, in roughly the order of purchase...
Steinway upright piano
Hohner Melodica
Galanti accordion (120 bass)
Howard Baldwin Combo Organ,
Farfisa VIP 223 two manual Combo Organ
Hammond (1963) M3 with Leslie 147RV
Hammond B-3 with 2 Leslie 147RV (one kept over from the above M3)
Wurlitzer 200 Electric Piano
Roland SH-2000 Preset Synthesizer
Polymoog Synthesizer & Polypedal
Roland Jupiter 8 Synthesizer
Yamaha D-85 three manual Electone organ
Yamaha C-605 two manual Electone organ
Yamaha C-605P two manual portabilized Electone organ
Yamaha SK-20 Ensemble (Organ/Strings/Brass/Synth)
Yamaha CP-30 Electronic Piano (Analog)
Yamaha CLP-300 Digital Piano
Roland KR-55 Digital Piano
Yamaha PF-15 FM 76 key Electronic Piano
Yamaha CE-20 preset FM synthesizer
Yamaha CE-25 preset FM synthesizer
Yamaha GS-2 preset FM synthesizer
Yamaha DX7 FM Synthesizer
Yamaha DX-100 FM Synthesizer
Yamaha DX7 Mk-II Dual FM synthesizer (Grey Matter E! chip equipped)
Casio CZ-101 PD (Phase Distortion) Synthesizer
Casio CZ-1000 PD (Phase Distortion) Synthesizer (two)...one modified for use as keytar
Casio CZ-1 PD Synthesizer
Casio FZ-1 sampler
Arrangers...
Yamaha PS-6100 Arranger
Yamaha PSR-6300 Arranger
Yamaha PSR-500 Arranger
Roland E-20 Arranger
Roland RA-50 Arranger Module
Roland RA-90 Arranger Module
Roland E-30 Arranger
Roland E-5 Arranger
Roland KR-500 Arranger/piano
Roland KR-650 Arranger/piano
Roland KR-55 Digital Piano
Yamaha PSR-510 (Two)
Yamaha PSR-1700 (Two)
Yamaha PSR-8000 (Two)
Yamaha PSR-2000 (Two)
Yamaha PSR-3000 (Two)
Yamaha PSR-S900
Yamaha PSR-S910
Yamaha Tyros4 with 1 Gig memory upgrade (Present Keyboard)
Other amp/speakers (not including Leslie cabinets above):
Two Fender Twin Reverb Amplifiers with Celestion Full Range speakers and added tweeters & crossover
Two Yorkville KB-100 keyboard amp
Two Yamaha MS-60S powered monitors Still use these today.
Although some instruments were only used for a period of months, when I look at this list, even considering it is over an approximately 45 year career working full time in music, I'm not quite sure whether to be amazed or ashamed.
One thing for sure, it was a great education regarding keyboards.
Ian