I just received a camera slider. I had ordered a Kamerar SLD-230 23″ Camera Track Slider for $99. I have always wanted a slider and was looking for a small one that would fit in may suitcase when I fly. Thus it is short, 23 inches to be exact. I did not want to spend a lot of money. This is a friction slider as there are no wheels or bearings. It takes a little more work to get a smooth move, but it is inexpensive and small.
Here is a trial that I did to test it out. Shot with the Panasonic GH2, the Lumix G 14mm f2.5, the Leica Summilux DG 25mm f1.4 and the Olympus m.Zuiko 45mm f1.8. I edited in Final Cut Pro X with no transcoding of the raw camera files.