I have one of these for sale.

http://h10010.www1.hp.com/wwpc/ca/en/sm/WF06b/12139188-12139280-12139280-12139280-12434660-80069917-80989111.html?dnr=1

Note that it has an 80gb hdd rather than the stock hdd and if you can provide your own power supply I'd be willing to go a little cheaper as the one that came with it is dead and it's currently using my only spare.

Currently running windows 7 for test purposes (surprisingly well) but it's has a XP pro oem key on the bottom and I can install that or ubuntu 12.04 if required. 

Battery seems to be in reasonable condition, I have a spare battery in not so reasonable condition if wanted. Physically it's in pretty good nick, a few minor scuffs on the case.  

These are selling for about $300 on trademe, would accept >= $225. 

Prefer pickup from Lower Hutt, but can send it at purchaser's cost.