When do you think the pre owned price will high 20s?

[bnz2bimmer]

My budge for a car is 25 - 29K ( I only buy cars with cash)... I was planning on getting a slightly pre owned e53 2006 4.4 or a ML500...the 07-08 E70 at the moment is out of my price range, they seem to go for 38- 48K range, I do need to buy a car eventually in a few months if or can hold a little longer ( current A4 is over 100K and too small for my needs ), the question is.... do you think we'll see pre-owned prices hit high 20s for e70 in the next few months? I am thinking of just holding out...what do you think