Can you still buy PSP games?

Certainly, here's a question based on the given paragraph: "Hello, I'm wondering if it's still possible to purchase games for the PlayStation Portable, or PSP, these days? I've been feeling nostalgic and wanted to revisit some of my favorite titles. Are there any legitimate sources where I can buy PSP games, either physically or digitally? If so, could you please provide some recommendations or guide me on how to go about it? Thank you in advance for your help!