How much machine can do overlock and sewing?

The Overlocker 644D and Brother 3 Or 4 Thread Overlocker - 2504D from your search results are both great options for a machine that can do both overlocking and sewing. The Overlocker 644D is available for R6299 - it's a 4 thread overlocker so it can sew seams and overlock edges in one step. The Brother 2504D is a versatile machine that can both overlock with 3 or 4 threads as well as perform regular straight and zigzag sewing stitches. Let me know if you need any other details on these machines or have additional questions!