Many just specialize in a specific area. There are entire collections of tobacco, coffee, condom, agricultural, popcorn, tea, insurance, candy, oil, beer, veterinary, peanut butter, soda, typewriter, clothing, spices, etc. The list goes on. AAAA Members enjoy their hobby. Most advertising items are very visible and members love to show their collections.
Members display their items at the annual convention and other shows.
They also love to talk about their prized items and discuss their latest finds. One of the best sources for getting really prime, top quality and scarce advertising items is from other advertising collectors. Buying, selling and trading with one another.