i have two "home organs".. a Conn spinet I grew up with..mid to early 60's spinet, tube organ. Is very screachy until it warms up then it is fine. VERY nice flute tones, so so diapason, not so great strings and really ugly reeds.
It has a pretty neat sustain feature that is quite useful and musical (well at least to my ears, i grew up with it).
Issues: lots of tubes, but they are replaceable and a can of deoxit would probalby cure all the screaching on my Conn but its at my sister's house and I don't forsee messing withit anytime this decade.
Another organ I have for the home market: A Hammond M3: Really classic sound, you'll either love it or hate it... built like a tank, with that classic "hammond tonewheel sound" that is unique to itself.
Maintenence is basically oiling it once a year and fussing with the tubes should it be screachy.