Liberon isn't the only brand - there is also Briwax (part of Rustins), Hafele and
Konig. As to getting a full set? Good luck there - there must be 150 or more shades on the market! (I came across a set of
greys this afternoon looking this up).
I've had some cheaper stuff from Amazon before now - no problems with it, other than the sticks being a bit on the small side. Depending on what you are doing you probably only need 6 or 7 colours (?) for solid wood work - something like Jacobean oak, mid oak, pine/light oak, dark walnut, red mahogany and white - which if mixed together can form a lot of wood shades and hues. I've had a Hafele set with 24 colours for ages - and only bought-in a few larger (Liberon) sticks as required, mainly light and medium oak (because hardwoods I deal with are predominently oak or ash species), which then get mixed with small amounts of the Hafele colours as required to get a better match. If you want to blow your mind have a mooch around the Konig UK website - truly enormous range
I'm left wondering, though, how much wax you think you'll need in a lifetime?