Moving soon and need money

Hey hey
At the end of this year I will be moving and I need money, your hard earned money.
I am trying to sell all my White and/or Green cards because I'm a Grixis man.
Willing to sell at 50% off market value as long as you buy $100 worth of cards after the 50% discount
Anything under that will be 25% off.
Please Help & Thanks for your time!