Topps released the ALF Series 1 trading cards in 1987. Note: The regular set is usually assumed to contain only the basic 47 cards. There are four back-variations in the numbered stickers, and all variations are needed to complete the two puzzles. Each of the variation stickers is no more rare than any other sticker, thus the planned sticker set is 22 cards with 18 numbers. Because the stickers and Bouillabaseball card sets are both 22 cards and were inserted one-each per pack, they can be thought of as a combined insert set on a scarcity basis: A display box contained enough common singles for 4.1 sets, and enough stickers and BB cards for 2.2 sets each. Collecting decisions are difficult because Series 2 had only half as many stickers, with twice as many of each distributed.