Willing to trade all this for a 100+ gallon fishtank setup (for s.rhom)plz help!

ok as you may or may not know, i live in metro detroit, and my dad is an auto worker who has been laid off for 1 year, he just got a job, and im in desperate need of a 100+ tank for my rhom, i have no money, but am willing to trade 20 gallon tank, 45 gallon setup w/stand, nintendo ds, and polaroid digital camera, id rather not trade the 45 gallon set up (which rhom is in now) because my uncle gave it to me, and it was my first tank (sentimental value) but i will do whatever it takes, the nintendo ds comes with the charger.