Video Game Collector was a semiannual magazine/price guide with a predominate focus on retro game collecting. It was originally distributed - at least in part - via Blockbuster rental stores and Diamond Distributors (making the magazine available via specialty retailers and comic book stores). It appears to be defunct with no new issues published since 2010 and vgcollector.com no longer active.
A January 2016 capture of the magazine's website is available via the Internet Archive's Wayback Machine.
Video Game Collector Index