I Bought my K6 at exactly this time last year (To the day, Happy Birthday Skye!!
) and got £5,900. BUT, they had already released the K7 at that stage.
If you can wait, I'd say hang on until the K8 is announced. Should affect the discounts on the remaining K7's I'd guess.
(NOTE: The prices also went UP between K6 and K7, so that's a pretty good discount already)