Broken sewing machine

Just when a rainy day came along, with no homework to be done, my sewing machine decided to break.  It's an ancient machine, at least 20 years old, and about every other time I sew on it something goes wrong.  The tension is always getting messed up, or it's timing is off so it's breaking needles left and right, or it chews up the fabric.  Now the feed dog broke, so in order to sew, I have to pull, actually pull not guide, the fabric through.  Not good, especially since I have to work with some stretchy knit fabric.  So now, I either need to fix the machine, or go buy a new one.  And even if I do fix it, a new one is going to be needed soon.  So here's three cheers for sewing machine shopping!