i loooooooooove 40k, have a day at the main HQ every month with a couple of the regulars.
If your looking to get cheap, it depends on how you wish to play the rules. You can find alot of unofficial minature developers, these chaps create sprues of there own design but are in the same theme as 40k and the same scale, so you could for example buy a full setup of shock troopers and play them as if they were imperial guard for a measly 40 quid. now if you wish to take your minatures into a store for gaming, or do as i do and pop into the main HQ you'll not be able to play with them and they'll kick up a fuss, either use the real deal or build stuff yourself essentially.
seeing as nobody else is posting, Here's snazzdakkas Gitz!
an old Lineup of my unbased patrol army
Giving some Grey Knights a royal bashin!
And my experimental looted tank, Da Biggun! not given a proper paintjob and has been through a dozen remakes mind
The new Warboss! just need to rig up a new bit of dakka and build a chainsaw klaw thingie!