It really depends on the people in your area, how much they are willing to pay and if they have ever heard of tramadol or know how to use it.
Some people claim to get pretty high off of a small dose while others take very large doses and still feel normal.
If you can find some opiate addicts they may be interested as tramadol helps withdrawals.
For shits and giggles i'll put the street value of Tramadol at a dollar a pill max, and for that price who would refuse?