Plurals aren't always bad at all. A simple example, a retailer selling smart shoes would probably rather own "smart shoes dot com" than "smart shoe dot com" (shoes indicates they have a "range" of shoes, than one shoe)
For Stylish Kits (essentially stylish sports clothes), I would probably prefer a word like "cool" instead of "stylish", mainly as I see this aimed at children the whole stylish / cool kits thing, the way I'm viewing it
Cool Kits - Lower thousands
Stylish Kits - Lower hundreds (with the right buyer)
Who said plurals are bad?UsedCars, MyCakes, GetTickets etc - if it's something you can sell (items!) - these are awesome names.
Kits you can sell, however I also think that ''stylish'' it's not the best word here. It's probably sellable, with the right price, good amount of patience and to the right person. You can put mid to high $$$, but leave Minimal offer to a very minimum and see if there is any demand.
Good luck!


