hehehe, yes it is very expensive if it is bought from retail camera shops. but if it is bought of b&h or something, it is about $5 a roll...not too bad. don't be afraid to use it or waste it...i think you'll really love the results. most new camera's light meters are accurate enough to be able to use slide film (even my friends old nikkormat ft3 from the '70s got good results). so just play around with it and bracket a few shots to see what works and what doesn't. hope that helps:)
Thank you for the comments, John. I have been carrying 2 films of Velvia in my bag for a month now - to scared to use it. It is hellishly expensive. I had a look at my print. It contains a lot more detail. I will scan another from the same film and post it. One problem that I can see is that if I view the picture on usefilm it is much darker than when it is viewed in MGI (simultanuously).
this looks very surreal and peaceful. it's a little soft on the focusing though. also, try using some 100 speed film for landscapes...or better yet, some 50 or 100 speed slide film! fuji velvia is a good one for landscapes...
but if you don't want to try out the slide films, then try some fuji reala 100 or kodak supra or agfa optima II 100