I can give an idea about starting price you should ask for Ontario, as can alot of other members about the areas they live in. Maybe start in the $1800-$2000, but across the bridge in Port Huron, Michigan maybe $1000-$1500
But I wouldn't suggest that would do you much good.
Your area may command a much higher price and therefore you might just give away money by pricing too low..
I just bought a '85 250es in Michigan for $1000 because it's just a trip across the bridge to Port Huron for me, but in the Toronto, Ontario area one in this condition would easily be $1500, maybe even close to $2000 to the right buyer..
Though it will be difficult because there aren't alot of other 87 200x in your area, try to research your local CL or whatever other tool is used to sell things.
Current toys..
1986 Honda 350X..trail bomb!
1985 Honda 250SX..my main mudder
1985 Honda 250ES..Back in Black Trike
Current non-trike toys:
1990 Honda TRX300FW
1995 Seadoo GTX
1998 Polaris Indy Lite 340(Nearly new looking)
1998 Polaris Touring 500
1998 Club Car (electric)