Buying NEW (cyclo cross)- how much can you haggle?

Am looking at buying a brand new cyclo cross- in peoples experience- how much can you haggle from sellers? Are some brands (eg specilized) less likely to drop than others (eg Kona?)
Examples (from different retailers):
2010 Specilized Tricross Sport- £850 (no discount advertised)
2009 Kona Jake the Snake- RRP £1000, Sale price, £850
From experience- how much can you haggle down a bike? I suppose its easier to get extra stuff thrown in- but how much free stuff can i haggle off?
Is a 2009 easier to haggle down (given its already on sale)- or surly its better to sell a 2010 bike at a discount than not at all?
(i also need to decide between the above two bikes- having tried them both for size of course- so if anyone has any advice on that- feel free
)
Examples (from different retailers):
2010 Specilized Tricross Sport- £850 (no discount advertised)
2009 Kona Jake the Snake- RRP £1000, Sale price, £850
From experience- how much can you haggle down a bike? I suppose its easier to get extra stuff thrown in- but how much free stuff can i haggle off?
Is a 2009 easier to haggle down (given its already on sale)- or surly its better to sell a 2010 bike at a discount than not at all?
(i also need to decide between the above two bikes- having tried them both for size of course- so if anyone has any advice on that- feel free

0
Posts
So now i need to decide between 2009 Jake Snake (in a horrible green)- but its £1k worth of bike. Could get some stickers i suppose....
Or a 2010 Spesh Tricross Sport at £850- which looks REALLY nice!!!!!
Yes- i probably could....just- but are local dealers likely to have such sales? Or Even the bigger online ones? I always picture sofas clothes and beds on in the sales- but not bikes?
Please correct me if im wrong!
Bloody hell- thats insane- so nearly half price???? Eg a £750 bike for £350? Was that nationwide or just in one shop?
God thats tempting....
That was for the Tricross Single I believe. Retail price was £450. Pearsons had one for £275 I think. I hummed and hared and missed out
Kona Jake the Snake
Merlin Malt 4
the Jake the Snake is 15% off which isn't bad i guess.....