So this where I am at present.
Bought a "new" xBox
Quite pleased, as it was fully boxed, came with official pad (which I didn't have previously), instructions, and all the other usual stuff. And it only cost me £6.99
As a side note, in case anyone is reading this, I would update the Dashboard before doing a softmod (I used LMA 2006) Reason why, had loads of problems creating a backup, then got error 13 upon console startup. Luckily I had made a backup of the MS and C:Drive (though the SID told me I hadn't) and I was able to get the MS Dashboard back.
I then updated the dash and all appears fine now. I would however like to put my other xBox back in a softmodded state before I sell it, but will look at doing that later