How well would Robot Kits sell online?

I was thinking about selling Robot Kits online such as Robonova, Bioloid, Kondo KHR-1, ect…
However, I do not know weather or not people invest enough money in these kind of products.
I would also sell accessories for the Kits as well like Servos and Chargers.
Does anyone know how well these Kits sell?
Any info will help.
Thank you!

I have a whole lot of info I can share. email me