Over the past two years I have been collecting FS notices for Syncro
Westies from this list and ep.com and a few others.  As I may be selling my
91 syncro westy, I decided to tabulate the ASKING prices of the FS vans on
which I have collected data.  In an effort to head off criticism: this is not an
academic study, it is anecdotal at at best and some vans may have been
counted twice (thrice?) if I didn't catch that it was listed here and Ep.com
and other places.  Also the data is irrespective of milage and condition.
Price is in US$.  FWIW, here are the summary results and then the raw data:

Year    AVG:    St Dev. Count:
1986    13,522  1,742   11
1987    15,427  1,990   20
1988    no data no data 0
1989    17,011  1,616   9
1990    19,473  4,052   19
1991      17,208        3,662            6

Here is all of the data that I have, year, and asking price (x1000):

        86      15.5
        86      15.5
        86      15.45
        86      14.5
        86      13.9
        86      13.9
        86      13
        86      13
        86      12
        86      12
        86      10
        87      20
        87      19
        87      16.75
        87      16.5
        87      16.5
        87      16.5
        87      16
        87      16
        87      15.9
        87      15.8
        87      15.8
        87      15
        87      14.8
        87      14.5
        87      14.5
        87      14
        87      13.5
        87      13.5
        87      12
        87      12
        89      18
        89      18
        89      18
        89      18
        89      17.9
        89      17.9
        89      16.8
        89      14.5
        89      14
        90      27
        90      25
        90      25
        90      24
        90      22.9
        90      22.5
        90      22
        90      21.75
        90      18
        90      17.75
        90      17.5
        90      17.5
        90      16.9
        90      16.5
        90      16.2
        90      15.5
        90      15
        90      15
        90      14
        91      22
        91      21
        91      17
        91      16
        91      14.75
        91      12.5