How much would a fiftey year old monopoly board game set be worth?

It's impossible to give you an exact value for a 50-year-old Monopoly board game without more information. Here's why:

* Condition: The condition of the game is paramount. A complete, pristine set in the original box with all the pieces in excellent shape will be worth far more than a worn, incomplete set.

* Edition: Monopoly has been printed in many different editions over the years. Some are common, while others are rare and highly collectible. You'll need to identify the specific edition you have.

* Rarity: Certain editions, especially those with unique features or special packaging, can command higher prices.

* Demand: The market for vintage Monopoly sets fluctuates depending on demand and collector interest.

To get an idea of the potential value:

1. Identify the edition: Look for the copyright date and any other identifying information on the box or game board.

2. Assess the condition: Look for any signs of wear, tear, missing pieces, or damage.

3. Research online: Use websites like eBay, Etsy, and online auction sites to search for comparable sets. Pay attention to the prices they're selling for, taking into account the condition of the listed items.

Remember: You can always consult a professional appraiser or collector for a more accurate valuation if you need a definitive answer.