This question is a great way to show that you value long-term relationships with your clients/ customers by how you respond to this question. Instead of making a quick sale that you know does not meet their needs, you provided an alternative that did.

"I was speaking with a potential customer I realized some of the key features they were looking for were not all available on the current version. Even though the newer model was slightly more expensive I reminded the customer of the features they wanted. I suggested they might be disappointed purchasing the current version and if they were still on the fence to look at the recent reviews."