Best time to look for a new 2nd hand car

[Manicminer]

I'm looking to replace my car and was curious if there is a best time of year to go looking.

I'd guessed that now would be quite good as no one has any cash after Christmas and people getting new Reg's in March have more than likely already ordered.

It was put to me though that the weeks following the new reg date are also a good time as the 2nd hand car market is flooded with trade ins that the dealers just want to move on.

Any traders see any trends this time of year?