Its just i play allot of game and need to have the disk in when you're playing the game and don't really what to buy all the digital versions of my games again.
With the prices that classic digital games go for during sales, I think it's inevitable. If you have the patience, digital titles can be had for dirt cheap if you can wait for frequent sales.
Just picked up the Command & Comquer Ultimate Edition for a mere $25 during today's Black Friday sale. That includes 17 games, which comes out to just $1.47 a game. and I still believe that the title will drop even lower later. Also picked up the Ultimate Mortal Kombat Kollection for a funny $2.99 at Amazon, as well Crazy Taxi for iOS for the same price (which is also available digitally for Windows at less than that).
Unless you have a huge extensive library of catalogue titles on discs, it may just be more financially sound to rebuy the titles rather than purchase the SuperDrive for $80. Of course, you could always find a cheaper drive alternative other than Apple. And then again, you could always sell back your physical copies. Lots of hardcore collectors lurking eBay out there.