How PS Vita, Nintendo 3DS are doing in Japan | Eurogamer.net
Why PS Vita's Japanese Sales Figures Aren't Bad After All | TheSixthAxis
Sony figures show PSP sales falling - but more sold than you may expect | Technology | The Guardian
Exclusive: Sony PSP Versus Nintendo DS - The Sales Showdown
Sony Logs Profit In Q2 2010, But Sees PSP Sales Dropping 50% Year-On-Year | TechCrunch
Just a quick and interesting WIKI screenshot of consoles by sales. PS2 is the best selling while Dreamcast is the worst (only included relevant systems). Sony is in the top ten 5
Kensington Video Vault for PlayStation Portable (PSP) for sale online | eBay
3DS vs PSP – VGChartz Gap Charts – October 2018 Update
Exclusive: Sony PSP Versus Nintendo DS - The Sales Showdown
PSP PSP-DELAY-BUNDLE Collection Of 5 Delay Plugins [Virtual] | Full Compass Systems
PSP & PSV unit sales worldwide 2004-2022 | Statista
PlayStation Portable | Video Game Sales Wiki | Fandom
A Visual Look at PlayStation Sales Numbers
Sony expects 10-15% sales rise for PSP/PS3 this year | Engadget
PlayStation Portable - Wikipedia
Japan's October Hardware Sales | TheSixthAxis
PlayStation Portable | Video Game Sales Wiki | Fandom