I would bet less than 25.
If even half that - I always forget, then have to remind myself of the changing demographics of who's buying 80's nowadays versus even 3-5 yrs ago.
Despite my price for mine, I could sell it or not - and really it doesn't matter to me. My whole idea to sell is based on the fact I'll be buying a CNC mill & going self-employed, at the same time buying a new boat & not wanting to have anything on credit/loans.
Back to the reason for posting:
A $3500 S/C kit (price based on near lowest C-Dan sold to us all for), back when many of us floated $20-something or high teens prices for our 80's the S/C @ that price was maybe 15-20% of our purchase price. A couple hundred bucks spent on average wear parts & some little cute parts from American Toyota to help "feed Dan's dogs" wasn't much of an issue.
Fast forward to current day where guys are gun-shy on $2500 80's & you can get a very nice (has near 200k on it) LC/LX for $7500 to say $12k for a top condition one - now that same S/C can be something to the tune of 30-50% of a purchase price, and guys think it's nuts.
Add to that the level of maintenance a forced motor needs/co$ts & the current owners balk at that $3500 entry + motor work to keep a S/C happy. I even had a new member blast me as "irresponsible" when I encouraged another guy about experimenting with a few hundred dollar header. With the new members comes a new facet that to some, the money of a experimental part is a bigger deal than the issue of the part itself performing as advertised.
Good or bad, lots of new owners who buy a $5k 80 aren't going to pony up $3500 (or the $4000+ I'd expect a new batch of supercharger from Mr. T to cost -if at all since they are dropping the program across the board- or if say Sprintex, etc jumps up & develops a kit just to get balked at when they hold fairly close to the $6800 the proposed cost was.
That's going to be the rub, guys who buy a $3500-4000 S/C kit are now plunking down a solid percentage of their 80 purchase price, so to them it may be unreasonable - and for most who could afford a kit when the 80 was still high teen$ for a average one, they already did.
I don't know - really don't expect a big group who really drop $3500 - I think it has far more charm as a NLA item than real demand if it was still in production. That's just my opinion.