Bug with the merchants buy/sell price

[LordMalicia]

Hello everyone; before we start, I would like to apologize for my bad English.

That said, I would like to know if anyone has encountered a small bug that affects the prices of purchase / sale of items in the game. Here you have some pictures that I have taken for you can compare and see.

This is before the bug:

 

 

 

And this after the bug:

 

 

 

 

You can clearly see that prices fall enough; Another example are the potions, small sold them $ 12 men and 16 $ to women now buy at $ 8 and $ 10 respectively.

I did not realize how much until recently and looking a little seems that the blame is when I installed one of the patches; (The Heartfire if I remember correctly), uninstall the patch for something; I do not remember why, and do not know what could have happened.

I thought about starting a load a previous game; but I am half with the minions of the Dawnguard and the oldest is when just killing the first dragon of the game.

Can anybody help me?

I used the Edit and verify the game cache but nothing works.