is this worth it?

[02yfs]

i have a chance to buy a 400 ex with these mods for 3100... is it worth it?
420 bore
11:1 wiesco piston
Stage 1 hot cam
Stage I head porting
Stage 2 dyno jet kit
Full HMF exhaust
Heaver valve springs
Dg nerf bars
Works triple rate front shocks
Renthal bars
E-brake block off kit
520 no oring chain light weight
Gripper seat
Powder coated frame

Quote from the owner "The motor was built by advanced maching in pa I have the recpits I smoke all stock 450rs it runs very strong."

[underpowered]

that is about average for a bike like that. what year is it? i would buy it if it is atleast an 02 model.