In the Nada Guides.com there are two models listed for the 1998 Sunvoyager 8342.
One is the 8342MXG the values are listed as low retail $26,640 and high retail $32,090
The other is 8342SVB the values for it are $42,630 and $51,360
As far as what is standard or options that I do not know.
You can check the NADA out here:
http://www.nadaguides.com/home.aspx?l=1&w=28&p=0&f=5000