The first one is a used Juki Lu 562 - from the little bit I have found to read about them it sounds like they can sew up to 20oz of leather and are an overall good machine. This particular machine has not been used in over a year, the gentleman that used it had an upholstry business and has passed away. I spoke to his wife about the machine and she said it is in good working order. She is asking $650 for the machine and a couple tables he had to go with it. Is this a good price? Would this machine work for what I do? My guess is not being used in so long it would need a good servicing. Correct?
Take sample of what you want to sew & try it out,that's not to bad of a price if it sews ok,you should oil it too before you sew on it,esp the hook & bobbincase area.
HTH
Bob