Atari 800 The Detective by Infocom

Just found a  complete example of "The Detective" by Infocom any ideas of how hard to come by  this is?

comes with tons of paperwork,  matches, clues, magazine, case file etc..

I   would consider a trade for rare Atari 2600 games and perhaps a few nice Atari 800 disks  "Dropzone" is one i'm after but i'd need a few games for this 2-3 as I think this has to be less common than games like Dropzone and it looks rather special with all the extras you get with it.

I'm in the U.K but NTSC games should be o.k. I would perhaps sell it so  offers can be sent on here or direct to atariattic@hotmail.co.uk

One thing to note is that its probably PAL or works on a PAL Atari so please bear this in mind.

Thanks Antony