A Juki industrial machine is a factory workhorse. At $100 for the machine, motor, and stand ... it is a good buy.
I paid $500 a number of year for my singer version ... just as a comparison
changing the wire on the little sewing machine may change the value, but can't see that it would hurt the machine. The price you quote is a steal, considering the cabinet it is in.
Enjoy!
Haven't figured out when enough machines is enough ... but, I figure if I can save one machine from the garbage dump ... the world is a better place <g>.