nevermind
price drop to $700
I would really like to sell this without using ebay, their fees are ridiculous. If you’ve got something in mind, make me an offer.
You’ll have to excuse my ignorance, but what is different about the SD compared to the Z model?
About 0.4’’
Seconds, that is 
Price drop.
$650
You should see about getting it serviced by Moog an then getting full value for it.
Likely it’s 1 hr. work and it will cost you a few hundred seeing as it has problems.
The 104z is pricey but I’ve seen SDs which are several years old go for more $$.
(just some friendly advice)