I have decided that I would like to add a serger to my sewing room because I want to start making clothes. This is not something I intend to get into in any big way, but I think a serger would be a nice addition. I don't have the budget for one of the fancy newer ones, so I am looking at lower end models and at second-hand. I noticed that reviews for the Brother 1034D on Amazon are quite good. It was also listed somewhere as one of the best sergers of 2015. I have also considered a used Babylock (BL402) on Craig's List for about the same price but wrestle with the idea of new (with a warranty) versus used, even though the BL will do 2, 3, or 4 threads. Is this necessary? Is there anything else I should be aware of?