I agree with Mom6 some of the older machines are great workhorses. Maybe just a little check by a local repair person and you will be good as new. .... and able to save for that once in a lifetime machine you want, which may well have free financing for 3-5 years.
Having said that ... check them all out and see which you bond with. Then: which machine has the best support for you locally and/or via the net. Check out used machines as well as many are upgrading and trading in thier current machines.
ali