Enchanting is your friend!
1. Save all the tiny 10 g daggers you can find (any weapon would work)
2. Make sure you have a lot of souls captured. They dont need to be in a fancy container. The lowest level one is fine.
3. Enchant dagger with Fear or Stamina reduction.
4. Your 10g dagger is now worth over 600g
Rejoice and buy all the houses in Skyrim. Drown your self in women and vine. Not really.
There is a problem regarding vendors.
They have a limited amount of gold. Right now i have tapped out all the vendors for gold in all major cities - so there are really no one to sell all my fancy daggers / weapons to
