McDonald’s is offering a $2.50 McDouble for a limited time on its McValue menu — but some customers argue the so-called “deal” highlights how far fast-food prices have climbed. “On social media, some folks have voiced their distaste for McDonald’s seemingly never-ending price increases, claiming that customers are falling for the old switcheroo,” The Takeout reported. “Anyone remember when McDoubles used to be 99 cents? It was only 10 years ago,…