Ree,
Thanks for your inquiry. Here is information I have learned about your air purifier/cleaner:
The Electrolux Model 1401/Super J was manufactured in the USA from 1976 to 1978. It immediately succeeded the 1205 J/Golden J (so called because it marked Electrolux USA's 50th Jubilee) and was the immediate forerunner to the 1401B/Olympia One (a name referring to its sole designation as the official cleaner of the 1989 Winter Olympics in Lake Placid, NY). The earlier versions had the same hose as its predecessor--white with trios of teal-gold-teal stripes, and the later ones had gold hoses like yours. The power nozzle model for both versions was the PN-4 (made only for the 1401 and 1401B), although the earlier ones were cast aluminum (like the PN-2s) while the later ones were gold-painted cast aluminum. The original attachments were all ivory; although the floor/rug tool's metal plate (by the floor brush) was painted gold like the machine.
This model was still made in the era of high quality parts and is an overall durable and reliable cleaner. I would suggest keeping it, although you will want to check or have checked the motor brushes and armature to ensure that they are in good shape. You didn't mention how it sounded, so if that is a non-issue the motor bearings are likely in good shape. Other than that, a good outside cleaning and polishing of the body and power nozzle will restore its original luster.
The value is hard to determine for vintage machines, because "beauty is in the eye of the beholder." Those who prefers earlier or later versions wouldn't pay as much, while someone who puts a higher value on that era will pay more. A machine with its original hose and attachments (or more) is always worth more. Correspondingly, a machine that has been cleaned and serviced prior to sale will gain a healthier profit for its seller. As such, the machine could be sold anywhere from $10 to $100; although the average is likely between $50 and $75.
The 1401/Super J is one of Electrolux USA's classics. It would make an excellent addition to someone's collection or be a sound investment for purifying the air and cleaning for anyone.