just got a 1994 Speedster with 20k miles. it came with dealer installed turbo widebody. i noticed the value of these cars are not as great as the 1999 speedster. does anyone know why?

There was no speedster in 1999.

There was no speedster in 1999.
my bad. it should be the 1989 speedster.

You prolly found out the answer already, but my guess would be the fact the the 89 are a lot more rare. Believe there were around 850 made with only 300 being in the US. I think they had more speedsters in the 964 bodies, or maybe more people desire the look of the older model.