Can you still buy stuff on the PSP?

Excuse me, I'm curious about something related to the PSP. I've heard that it's an older gaming system, but I'm wondering if it's still possible to buy games, accessories, or even digital content for it? Are there still online stores or retailers that support the PSP, or has the platform become obsolete in terms of purchasing new items? I'm just trying to gauge the current state of the PSP and whether it's still viable for purchasing goods.