General price ranges I have seen:
$700 to $1000 (fixed stock at the low end).
Parts are difficult to find.
All (I believe) are pre-ban.
From the reports (I considered one myself once):
Somewhat Heavy
Shoots OK, moderate recoil
Definitely rates about 9.4 on the Cool scale.
However, that being said, I went with a Benelli M-3 instead. Utterly reliable, parts are easy to find, recoil is definitly stiff (it's a relatively light recoil opperated gun), and about 8.4 on the Cool Scale (if I want to find a folding stock for about $700 I could move up to about 9.2 on the Cool Scale).
A better gun for the money is the Benelli M1 or the same gun in a Beretta configuration, the 1201. Pre-bans can be had for $800 for the Benelli, $650 for the Beretta (unfortunately, the Beretta has fewer aftermarket parts available).
I would not mind getting a SPAS as part of a collection, but for real shotgun combat use, the Benelli(s), Beretta, or a good pump shotgun are a better choice.
AFARR