120Euro for the board, maybe more if he really has 256MB.
Rest depends on wether you intend to use it, 200-250 should be o.k.
Peg2 mostly comes with G4s clocked at 1GHz, don't suffer from those annoying Articia-Bus, come with newer firmware, can be fitted with high amounts of RAM much easier, runn with 133MHz FSB instead of 100MHz, will offfer much better RAM-bandwith ....
Thats why even a Peg2-G3 still costs about twice as much as an Peg1.