[ Hunting ] Open Question : Martin Phantom II Pro-Series compound bow worth?

How much would a newly strung (never been shot with new strings), Martin Phantom Pro II Pro-Series worth? Brand new when they first came out I know it was worth between $400 and $600, now I have no clue what it is worth and I would like to sell it for what it is worth, not over pricing or underpricing. Any rough estimations would be greatly appreciated. The bow specs: Sting: New never been shot, 49 inch Cable: New never been shot, 38 1/2 Weight: 35-50# Draw: 26" The bow is in excellent condition, checked for splintering regularly, none found. Thanks!