Not sure how many people would benefit from this but Rhino Sliders is having 30% off for cyber Monday on their Rhino Slider EVO + Flywheel with code CYBERMONDAY. Pretty sweet deal if you need a pretty top notch slider. This 30% off, from what I read, is JUST for those two items. Has free shipping and a 90 day trial period. They said there is limited stock on this.
Kind of related but the 30% off doesn't apply, they've been running a promotion for ages when you buy a Rhino Slider & Motion (or a bundle including both) they'll buy your old slider from you with a $500 Rhino discount code. Then you can buy some accessories, new tracks, Rhino Arc (motorized pan control) or even put it toward their new Rov slider for iPhones or something. I have no idea about that one.
I've used a couple in my time of different lengths, carbon & metal, their motion control, the Rhino Arch and they're pretty great. Their customer service has been really good to me as well. I would definitely classify this as a good entry level price for a pretty good slider. I haven't used the flywheel before, so I can't speak to that.
You can see some reviews here on Youtube: https://www.youtube.com/results?search_query=rhino+slider+review [youtube.com]
They talk a lot in these. I've been doing video professionally for about 15 years if it matters and I think it's a solid system.
Good luck and have fun.