It depends, cars are selling but just not as many buyers as before.

I find most people cannot shift the car they have so offer a PX.

I try not to bother with PX as you never know what your buying into so tend to go for straight cash. You just have to hold fire to your price. People will pay it once they have looked at the other tat for sale. If it is priced right then keep that price held, try never to be in a position where you have to sell as this will mean getting hardup and needing to sell cheap.