I can't compare relative to other cars in your area with regards to how much bang for your buck you can have, but for that amount of money for the Crossfire, you should be able to have some cheap fun (even if the spoiler never goes up again). I'm assuming you could still probably talk them down a bit further, so it may be worth taking a chance. Now if you planned to keep it and baby it, you'd probably want to start with less miles.. But as a fun toy to throw around for a few years, not so much a concern

Oh and the 1 to 2 shifting will be notchy pretty much no matter what, just shift at a bit higher rpm than you'd normally do and it should smooth out.