I have a Brothers machine that I keep for back up. I think I paid around $129 new for it. Only thing I have ever had to replace is the needle threader. Very nice machine. You can get them at Walmart.
If you would like a singer, check JoAnn's. They care singer and I believe you will find something in your price range.
I have to agree with some others. Keep an eye on Craig's list. They do have many older machines and sometimes they are the best machines.