The iBook blueberry 300 Mhz specs

Well the iBook I got did not come with a functioning power adapter so I have had to buy one of those for it. I did get it working at the Mac Group store wth their power adapter and it is a 300 MHz, 96 MB RAM and 3 GB hard drive. The Mac Group tell me it is very difficult, maybe an hour and half work to replace the hard drive. The memory can be placed in and upgraded with no real problem. So the question is how much money do I want to spend on this beast? So far I have had to cut down my plans for a really large hard drive like 80GB. I am probably limited to 20GB. In terms of RAM I can put in as large as 512 MB but this costs about 100$ almost half of the price of the laptop itself. Whereas a more modest 256 MB chips is only about 30$. So far I have spent about 45$ buying the powr adapter. I can stop here with just the power adapter for now. May be buy the 256 MB RAM. But I might also buy a replacement top and trackpad as the iBook is rather scratched up. But a new hard drive is not an option right now.