DailyPuzzles are having a 20% off sale off everything. They're also having a sale on a lot of cubes additionally.
If you want to learn how to solve a Rubik's cube I personally recommend learning from either J Perm or from CubeSkills and if you want to start learning cubing, here is a fantastic budget cube that I recommend, the RS3M
Speedcubes are much much better than Rubik's branded Rubik's cubes
They do have $4.95 shipping though unless you spend over $100
If you want some of the top cubes or other better cubes:
The Weilong WR M, GAN 12 series, GAN 11 series are probably the ones considered at the top. However there are definitely still other fantastic options such as older flagships, the RS3M MagLev, X-Man Tornado V2 M and more.
I don't recommend the cube lube
I used most of the tube but could still feel the corners going in