It was timely that this came up on Trade Me, after I went to a Photek live show back in September (http://vinylology.blogspot.co.nz/2012/09/photek.html).
Photek was instrumental in building drum & bass' wider profile in the late 1990's, with serious muso's appreciating the technical sophistication of Parke's complex, layered music. (He later moved into movie scores, most notably scoring 'The Animatrix').
I've got lots of Parkes' other releases (including 'The Hidden Camera' EP and classic 'Ni Ten Ichi Ryu' 12") but hadn't actually ever owned 'Modus Operandi'. This came into my hands, (thanks Grant!) for just $35.