The PSP had a Value Pack version at launch.
I bought the Value Pack version on day it came out in the US (I got it at WalMart I think).
The headphones were decent - and the remote worked well. The headphones in the Vita Accessory Pack are the worst headphones ever made - they feel like dollar store quality.
Huh, I did not know that. Yeah, if that's the case, I'm really surprised there's no bundle outside of the launch bundles that GS, Amazon, and Best Buy did. That's how I got my 3G model.