How much should I apply for my HP Pavilion ZE5400 laptop?

Hello. My friend wants to buy my HP Pavilion ZE5400 laptop with me, but I have no idea of how their request. I do not want to ask too much, because she is a friend, but I do not want to do very little, for obvious reasons. I can find no complete list on ebay, so I thought I saw what many think. Any ideas? Specifications: Intel Pentium 4 2.8 GHz 1 GB RAM 40 GB wireless hard drive ready for Windows XP Home CD / DVD writer floppy drive 1024 x 768 monitor (15 "approx, measured from the bottom left to right) Radeon IGP 345M graphics Microsoft Optical Mouse Touchpad with scroll pad includes wireless button off 3 x USB 2.0 ports Infrared port cable lock slot (security connector) RJ45 RJ11 serial parallel port PC card slot CardBus port and audio output (headphones) Microphone Thanks Jack!

Seeing suppose the following website 400-500 is a good price to sell. http://www.laptopcloseout.com/usa/store.html

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