Agreed, but the injection mold tooling for the whole kit is more like USD $5000.00~ China Price. ( I buy tooling frequently)In that case best to buy in bulk from China .... Look at this one from Ebay 7 Euros including delivery ....( probably 4 Euros each direct from manufacturer in bulk)
Two remotes to turn it on and off ... How can you possibly compete with that price ??? just the injection molding master molds for the white plastic cases would cost 100,000 Euros to set up .
The companies behind such products have a team of experts and state of the art design and manufacturing .. they can only achieve such price by cheap labor and selling 10's Millions of units .
Best to test a few different designs , and bulk order the one which works best .
If you can buy it for 7 Euros, they are probably ~ 2 Euros in bulk.