v00d00ppl:
I can confirm that ARMEN uses different pictures than the actual units he is shipping. I bought my SP1200 from him about two years ago for 2400 bucks. I think i was lucky, as it looks nearly mint like the ones in his pictures (no peeling, paint without scratches, etc). I also opened it up and it looks brand new inside everywhere. Still i had it serviced a few weeks ago (in switzerland) and it improved the sound and noise levels... cost me another 500 bucks.
I don't think you've paid too much. If you like the machine, you will agree it was worth every penny.
My tip for using the SP: Try it stand alone. Make a few beats with just the SP, it's a great experience. Also, you might wanna try out to use the SP as a master and trigger your MPC for samples... try quantized beats at double BPM and 67% swing in the SP, you'll get instant 90s boom bap groove. Triggering the SP and using other machines as master is cool too, but it would be a shame if you never try the SP as master, because you'd be missing out on that famous SP swing.
As far as mixers and number of channels go. I RARELY use all 8 outs of the SP. Much more common is 5 or 6... maybe another two from an MPC or ASR, and some more for sound modules, etc. I used to run out of channels when i had the 16 channel mackie, but that was a rare case.
Regarding floppy emulators, i would also suggest to try the SP with floppy disks first. You'll never need more than one floppy to save a beat... it has its charm working with floppy disks with the SP.
Anyway, just a few suggestions and basically my personal opinion (like they say, they are like arseholes, everybody has one

).
Congrats and have FUN!!!

"It is no measure of health to be well adjusted to a profoundly sick society." - R. D. Laing