You're right, I went back and did some research, it was the Level II model with the options that wound up being over $3000.00
Yep. They were intended as business computers, competing with DEC's PDP-series minicomputers and the like. (and the Apple LIsa? that may have been later...) Those were around $10K or so for a 4K machine with no I/O. My wife, who is much younger than I, has a slide rule, though, and I've got a book on how to use them. We got them for Y2K, mostly as a joke. She took hers to school one day, in addition to her TI-83+ Silver edition...
I intended to put them in a glass case with an "IN CASE OF EMERGENCY..." sign on them, but she wouldn't let me. ;)
We got ours off EBay, they are probably still available there, if nowhere else.