I think you've answered the question yourself If it's in excellent condition and at 200k mile The owner must be an advanced SL owner. And the guy would take $8500.00 in a flash. You could just take over the bills from there. My 73" 450 slc has 122k on it. I'm up to $10k US total easy and still going, to excellent. 
PS I forgot to add that I consider buying a sl c an adoption not a purchase.
PS I forgot to add that I consider buying a sl c an adoption not a purchase.