The worth of the game Operation today can vary depending on several factors such as edition, condition, and demand. On average, used or older editions of Operation can be found for around $15 to $30 USD on websites like eBay or Amazon Marketplace. However, certain limited editions or rare versions may fetch higher prices among collectors or enthusiasts who appreciate vintage games. Newer editions or special editions with unique features might also be pricier than standard versions. Ultimately, it is advisable to check online marketplaces or consult specialized board game forums to assess current pricing trends for purchasing or valuing an Operation game today.