I found a used engine for my 1989 honda accord. It has 25000 verified mileage comes with a 6 month warranty for $975. Is this a good deal? Price on a rebuild is about $1600 with 12 month warranty.

I have no idea but here is a site you can compare prices

Used Honda Engines - ASAP Motors

You might want to check around for people parting out or selling as is cars and tell them you just want to make sure the motor is in good condition.