An other thing to check is Ritchibrothers auction. I bought my fullsize bus last May in Prince George for 1750$.
There will be an auction this Wednesday the 7th of May in Prince George, you can sign up for internet bidding incase you cant be there. Maybe its worth looking in to just in case something goes cheap. They have a 24psg one on the list
follow the link, there is more pictures. It looks like it is a very nice unit.
Call the office in PG and ask for a sales person to find out about Diesel engine or not etc.According to Carfax its a 1994
Year/Make/Model: 1994 GMC B7T042
Body Style: BUS
Maybe somebody else can tell you according to this VIN if it is Diesel or not.
There will be a 16passenger one in Vancouver on May the 22, but has no pictures posted yet.
and then do a equipment search for bus.