The vintage Avalon Hill Diplomacy board game from 1981 is a highly regarded and sought-after game among enthusiasts. Here are some key details about this specific item:

1. Rarity: The fact that you described it as "rare" indicates that it is not commonly found in the market. This adds to its collectible value and appeal among board game collectors.

2. Condition:  While it's important to have all the necessary components for the game to be playable, the missing 1% refers to minor components or components that are not essential to gameplay.

3. Avalon Hill: Avalon Hill is a well-known and respected publisher of board games, known for producing high-quality strategy games. Diplomacy, in particular, is renowned for its intricate gameplay mechanics and focus on negotiation and diplomacy.

4. Age: Being from 1981, this version of Diplomacy is considered a vintage edition. Vintage board games often have a nostalgic appeal and are sought-after by collectors and enthusiasts.

5. Collectible Value: Complete and well-preserved vintage board games, especially from reputable publishers like Avalon Hill, tend to hold value among collectors. Rarity, condition, and demand among board game enthusiasts can influence the overall collectible value of the game.

It's important to note that the condition of the game, including the completeness of its components, will significantly impact its value and desirability among collectors. If you're considering purchasing or selling this vintage Avalon Hill Diplomacy board game, it would be beneficial to thoroughly assess the contents, condition, and any potential missing components before making any decisions.