is this a good deal for a used laptop?

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I opened this blog to help anyone who is preparing for his SAT.
I remember myself when I started - I was so lost and in such a panic.
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I need a laptop for school (10th grade). Mainly only for typing up papers, facebook, and surfin the web. I don’t really have to store documents on it soo the memory shouldn’t be a big issue. I have some pictures but i could store them on a flash drive. I put an add on craigslist for a used laptop because i have to buy my own with my christmas money (5) and someone responded with this offer, which was the only one within my budget. Do you think its a good deal and what questions should I ask the seller?
I have a Toshiba laptop you may be interested in. It is a P III at 850 mhz , 512 ram running XP-Home. I think the Hard Drive is 20 gig ? Not sure of that. I have the owners manual on the desktop. It is in good condition except the battery is shot. I have the AC adapter and it runs fine as long you plug it in. I also have a Wi-Fi card which works good at Borders etc.
We are a non-smoking home and it is in shiny condition , looks and runs good. I am not a computer whiz and bought this before I bought my better laptop as a temp substitute.
I have a non-matching mouse to go with it but it does have the little touch point to control the mouse. I may have a case for it. It also has a DVD rom drive and works to watch movies ( the main reason I bought it ).
Price is 0 firm , let me know.
I would think you might be able to get something a little newer if you looked on ebay. but that computer should work fine for doing papers and surfing the web if you decide to get it.
yes, probably so for 100.00