The phrase "appealing proposition" means something that is attractive or interesting because it offers potential benefits, opportunities, or advantages. Full definition
It made the laptop an even more appealing proposition for power users. (t3.com)
While arguably too late to change public perception of the title, the game you buy now (likely at a heavily discounted price) is a much more appealing proposition. (squarexo.co.uk)
Let's start by exploring the first option because the sheer numbers make it a very appealing proposition. (dealsagar.com)