Welcome to the site, good luck with your project, and finding a lude. I now own an SH and a base... I have had my base for longer though, and it has LSD now. In my opinion the SH is not as good as a base. SURE out of the box you get better handling. But it requires more maintanence, and the clutch is more of a biatch to replace if done on your own, or more money if done at a shop. The oil changes are even a bit harder to do since the filter is in an awkward position. Then there is the case of the atts unit having so many issues. And the small weight difference. Getting a base, and then finding a jdm tranny with LSD or having one correctly installed at a tranny shop is ALOT better than having an SH... Its something you have to push hard in the turns for it to work. When an LSD works ALL the time.. Plus I have RIPPED on SH models in the past with my stock base lude...
Whatever the case may be.. Dont ever buy an SS lude.. I dont care how many miles are on them. Or how new they are. Unless you already plan on putting some cash into it by doing a swap and changing things over to manual. I wouldnt buy an SS though at all.
H2B4 trannies and H22A's are now going for 750 bucks a piece at warehouses in my area now. Lucky me. I got both for 1000 a piece.
Good luck with everything!