I would seriously call around first. And 24k miles isnt crap these days, I do that in one year.And I mean seriously, call around. I know one time greenleaf offered a lifetime warranty on a neon motor we wanted, and thats probably about what you have in your car.
Honestly, it would be more cost effective to buy a used motor for 500-1k depening on warranty and mileage, then spend another $500 to have it installed.