I dont eBay though, and besides, I like the iBook, it is plenty fast enough for typing, which is all I use it for. I don't want it as a main computer, I tried that once. two screens sharing 32MB VRAM is no fun at all.
Arctic Silver 5 once you switch sinks, the Opty heatsink is VERY good, so don't switch unless it is a XP120 or a TT Big Typhoon or something. and don't remove the pad either, it is very good quality (Shin Etsu AFAIK)