This a cool find, a Unity Catalog from 1978-79. The catalog features various items including housewares, jewelry, toys, and electronics. Prices with descriptions provide great vintage reference material. The softbound catalog is in very good vintage condition and 468 pages, the catalog measures approximately 8 1/2" x 10 7/8".
Unity Buying Service, Hicksville, NY; was one of many buying services that were all the rage at this time. You picked something out of a catalog and then went to the showroom to pick it up. You were also part of a membership club, so your price was discounted. From looking at this catalog, calculators were hot!
For reduced shipping, catalog is acceptable for media rate mail (which is slow......). Please let me know if you prefer rather than Priority Mail.