Used bikes vs. New

[Riding4fun]

Gents,
Please give me the low down differences on these 2 machines; or should I just wait till I can afford a 07 300?

2003 Gas Gas 250 EC - $3000 w/ shipping
Well maintained – Runs Excel.

2004 gas gas 300 - $4500 5hr. drive to pickup
Desc: super low hrs. perfect condition. red. nickel frame, 6SPEED. Ohlins front and rear. Braking oversize wave rotors .d.i.d. lipless rims. arc folding levers ,acerbis hand guards,stainless cables and brake hoses. ti pegs ,ti nuts and bolts,blue printed motor, hi-lo ignition, V-force reed,FMF Gnarly pipe and spark arrestor(w DB snorkel),LTR ex manifold .GRUNTS and HAULS. handles FANTASTIC!!!! XTRAS!!! adult owned,never raced.

I should add that I have a 05 450 exc, and I'm looking to go 2t.