How much could I reasonably list this MacBook Pro for?

[454545]

Mid 2010 15" MacBook Pro
2.53 GHz Intel Core i5
4 GB 1067 MHz DDR3 RAM
500 GB HD (original)
SuperDrive is gone, replaced with 250 GB SSD (could put SuperDrive back in)

Cosmetic condition: scratches on bottom (many, small)

 

[Spink10]

Check eBay completed listings. I'm guessing around $500 to $600