I want my pc to be able to buy houses, but i have no idea of how to write a script for it, any help.

Why not DL a sellable house mod and see what the author did to make it work?

I have, specifficaly with dave humphrey's mods, problem is , I don't want a script exactly like that, and don't know what to delete and what not to.

Scripts to keep the PC out of the house until he buys it are very simple. Check the "Blocked Door" script for an example, It's just an on activate with a messagebox then return. there are several ways to allow entrance after purchase, the easiest would likely be setting a global variable in dialogue when the house is bought and putting the check for that into that blocked door script.

You can handle almost all of it in dialogue...

Here's a sample script:

Begin MyDoorScript;MyDoor is a global variableIf ( OnActivate == 1 )	If ( MyDoor >= 1 )		Activate	Else		Messagebox "This house is for sale buy it from XXX at XXX)		Return	endIfendIfEnd

Edit for typO

There is a mod called Natar's House set in Balmora. The guy in there offers to sell his house for x gold. Very simple, uncomplicated transaction. No quests involved. It's an old mod, perhaps around 2004. That might help you.