In a move to generate online traffic and pre-orders for the upcoming release of Justin Bieber’s Never Say Never documentary, Walmart.com this week offered autographed copies of the DVD/Blu-Ray combo pack for $24.96. Bieber personally autographed 1,800 copies of the combo-pack, which chronicles his rise to become a pop phenomenon. The strategy appeared to work as by mid-day Thursday the autographed copies were no where to be found on Walmart.com, although there was plenty of other Bieber paraphernalia. Those who missed out on the autographed DVD/Blu-ray combo, could still pre-order a regular DVD for $17.96. Never Say Never is scheduled for release in stores and online May 13.