ZXR 400 swap or sell

Description:

Hi I wanna swap my ZXR 400 1999 for a 600cc sports bike or Im willing to sell or part exchange and Add some cash if i need to.
Had the bike since January 2014, always starts first time, got some damage on the fairing (very minor) and the tank could do with a respray. Great little bike. I've just had a new exhaust system put on and some other minor work done and she's running better than when I first got it.
Had an mot in Feburary and failed on rear brake caliper which has been rebuilt by Brumer bikes Taunton and now has mot until next year. My friend recently reversed into the bike and although the damage has been fixed (only fairing and front mud guard) his insurance wrote he bike off as cat D. Like I said it's been repaired and I'm still using the bike everyday.