Buying a used Laptop. PC Gurus offer any input?

[OCDP]

I am getting pretty tired of using my home PC , and I'd really like a laptop for myself (wireless). A friend has a used one and I was just going to get some PC guru's input on the following. For the price of 375$ here is what I can walk away with (general specs, I'll know more later). Please advise and offer any input ...

Toshiba Satellite Notebook (don't know model # right now)
15" Screen
Intel Celeron, 1.8g processor (Are Celerons any good?)
512mb ram
80gig hardrive
Comes with a WAN Card
Windows XP Home


Also has the carrying case and a mouse. All this for 375$ , loaded with applications apparantley (although I may reformat it for myself)

Input?? For the price, it seems hard to pass up...

The computer will be used mainly (at this point in time) for personal use. Ie: music, movies, burning, games ..

Also, it contains a WAN card but I don't know if I want satellite internet ( I don't know the pricing ) .. but I woud like a wireless router at least... any input on good wireless routers [with a nice price tag?]

It contains the same stuff in my home PC if not a bit better.. so I am intrigued.

If ya can offer any input or whatever please do. Thanks.