A fiver to me plus postage of course lol ;-). Seriously, it is good specs and sounds a good machine but computers just do not hold their value, why not try selling it on ebay and give it a reserve price of £450 and see what you get. You probably think it is worth more and it might be but as I said they just do not hold their value.
AMD 4 ever it will sell better if you give a full descrition and a picture of the computer, plus is there a monitor with it? you dont mention that in your original post. I use ebay quite a lot and I never buy anything that has a poor descrition or no picture. Also remember and put a reserve price on it.
I take it you are supplying the Original Disks with the software? Office XP on that would certainly make it attractive, if legit......
One thing really puzzels me, why on earth do you have 2 floppies? These days I hardly ever have to use one and cannot, if I think about it, remember when I last did, let alone having 2!!!!!
Still, nice spec system and I am sure you will find a good deal of interest although the photo's could have been a bit clearer - I have a Digital camera I am thinking of putting on Ebay....maybe I could interest you...???