Comparing a VX sale to my 1999 Corvette purchase, I'd purchased a 10-yr-old $31k vehicle with 14k miles on it. I paid $14,000 for a vehicle with a somewhat higher demand in a good economy.
Here, you have the suggestion of $11.5k in a worse economy. Since the initial values were about the same and the age is about the same, it's possible to get a bit more. I'd probably start in the $13-13.5k range to see what happens.
After all, you will be looking for someone who REALLY likes the Vehicross and knows there can't be very many "cherry" specimens left out there.
In the case of my Corvette, low-low mile Corvettes are much more common. So, you do have that going for you!!!
Good luck!
89V