1988 CE Cab value? considering 93 964

[Ferrariguyma]

I am thinking about trading my 1988 911 CE Cab for a 1993 964 Coupe.

My car first:

1988 Celebration Edition Cab
12,000 doc miles
I am second owner (purchased with 8900 miles 4 yrs ago)
No paintwork ever
Completely as delivered (tools,books, manuals,sticker)
A/C converted to 134
Professionally lowered and corner balanced
3 local concours first place wins
Commeriative Badge on dash
Cardex
Window Sticker
Rides on chromed 16x7 and 16x9 Fuchs
Have orignal 15x7 and 15x8 correct color matched fuchs with new Yoko's (also kept original P7's with 8900 miles)
Pics attached



What do you think I could sell this for?

The car I am considering possibly even trading for is as follows:

1993 Black/Tan 964 Coupe
21,000 miles
5 spd
updated stereo (original included)
Asking $39k!!!!

http://www.copleymotorcars.com/sports_n_classics5_45.4vo994.html

Any feedback would be appreciated!

Thanks!