I get often asked what sewing machine would I recommend. Singer heavy duty 4423 is a work horse at reasonable price. I had mine for 5 years now and had it serviced once. It is manual machine, easy to use (not as daunting as electronic machines), you can set lenght and width of all stitches, it has one step button holes, can use free embroidery foot and 2 needles. It has all you need to start sewing. It might not be the sexiest machine but it will serve you well and to my knowledge its the best value for money on the market.
When choosing a sewing machine, think about what you want to use it for (dressmaking, curtains, quilting or embroidery). Also consider how often you will be using it and what you want out of it. Will you use thicker materials or mostly fine? Will you want to use walking foot to create quilts? Will need to make button holes and use free arm?
If you wish to spend more money and want something more robust, I found these models as being suitable. I got pfaff and love it!