This will be store specific depending on what old stock is kicking around.
I asked a member of staff at the Hermiston Gate branch (Edinburgh) if they had the Xbox 360 with 60GB for £125. He said no but he said he sold a couple of consoles (same as title) for £70 this week and he said they still had 1 through the back.
It includes 20GB drive and has a 2006 manufacture date.
I never thought to ask if they had any more.
It pays to ask as you may get lucky.
I have a receipt and could upload photo if there are any doubters.