Without going into too much detail, whatever GadgetValue.com says your laptop to be worth is irrelevant.
In your situation the best thing you can do if you want to get the most money out of your laptop is to market it well.
Let's presume you are going to sell your laptop on eBay, the well know and popular online marketplace.
There are likely hundreds, if not thousands of laptops for sale at any time in any country on eBay. This might sound obvious, but it is very apparent to me a lot of sellers do not seem to realise the importance of this. There is nobody specifically searching for the Acer Aspire 755, or Toshiba Satellite 36275, etc. etc, why? Simply put, they're not desirable models, for a plethora of reasons that are not worth divulging for the point I am trying to make, because regardless of whether or not someone is searching for your laptop, what's to make them buy YOUR laptop over someone selling another (or even identical) laptop? (You might be surprised to hear it is not price... usually.)
But back to what I was saying, which is nobody is looking for your laptop. To cut this post short and bring it to some meaningful conclusion, what they ARE looking for are standout "features"/details. I won't go into what standout features as there are many people look for (OS is one), but to provide some help to you, in your case, your laptop has two things going for it, 1. It has a large 17" screen, and 2. Even though it is certainly not good, it does have an ATI Radeon graphics chip. You want to make put this right at the beginning of your listing title on eBay. And last, TAKE GOOD PICTURES. Buyers will always look at the picture first before reading the title next. You can show one thing off to potential buyers without saying anything, which is simply have the default Windows background to let people know the OS, or, a simply ATI/Nvidia background can draw people in. Most people can tell what operating system is running on the laptop if they have been looking at any others just from the background wallpaper. The primary picture must not be dark as to hide any details, must not have anything in the background to draw eyes other than the laptop itself [[ i.e. reflections on the screen (yourself, ceiling light, etc), don't have the laptop showing something "complicated" (i.e. BBC website homepage) ]].
I hope this is of some help/sense to you. If not, feel free to entirely ignore! :)
Regards
Fox Computers
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[[ Really, I am inclined to say GadgetValue.com is not of much use for people looking to sell their devices, more if anything for insurance purposes. They won't buy devices off you, and they don't seem to sell them either. Not meaning to state the obvious and make myself seem a fountain of wisdom ( am certainly not ) You would be much better off at looking what devices similar to your devices go for on average on eBay (iPhones good example). or in retailers who sell used good (CeX etc) ]]