I'm not a big spender on DVD's. Many of my DVD's (more than 20%) were given to me, thanks to generous relatives in the US. I bought LOTR:TT Extended while the other two, FOTR and ROTK (both extended) were given to me.
The most expensive DVD I bought was Phil Collins: Finally... The First Farewell Tour, which set me back P1,500. The second most expensive would be the LOTR:TT extended (my entire set of LOTR extended edition costs less than the Phil Collins DVD!).