well I just done some research for the shake of it. I was one of the foolish people that paid a premium for my so called limited edition 'silver' fat playstation 2, only for sony to what I believe bend me over backwards and mass release it a few months later.
Well, after looking into it, my limited edition is limited to 10,000. The box which I believe I still have both of them, says 'silver' and not 'satin silver' like the common release and the model number is totally different, as it carries the normal model number of the black releases and not the special satin silver serial number which as SS on the model number.
I don't feel so bad now as it may be worth something in future.. so if you have one it might be worth holding on to it, or better still trash it so mind will be worth more in about 40 years time.