The website says it's discounted, but not by how much. A quick copy-paste:
*Limited Edition Item: Only 2,500 Produced
Link: http://www.telltalegames.com/backtothefuture-dvd
*Limited Edition Item: Only 2,500 Produced
- Collector's DVD with all 5 game episodes + bonus content
- Young Emmett, Doc and Marty on Exclusive DVD cover
- Photo Album: 15 portraits of esteemed Hill Valley icons
- Doc’s notebook: 6 pages with original invention diagrams and more
- Trixie Trotter commemorative postcard
Link: http://www.telltalegames.com/backtothefuture-dvd