CROSS COUNTRY SKI MACHINE by NORDIC TRAC ! Nordic Trac has been considered one of the best exercisers around and the Pro ski machine the most popular. This machine has been stored in our garage for a while and unfortunately has been gathering dust. Time for a new owner. The machine is in great shape and has been lovingly cared for. We have all the original manuals, instruction book. Come and try the machine to see if it works for you. (Machine is easy on joints)