Compatibilty in cheap and good devices for my smart things

hello. I wanna Add more devices to my smarthub. but the compatible 1s are quite expensive. I plan to buy it cheap and compatible to my hub. so, now I wanna buy micro smart switch for my home. online I find just 1 switch for the microswitch. where as my switches are square shaped 7*7cm. and each has 2 to 3 switchs. so I want to make up a double switch which would be also cheap for me. kindly if someone could help me out. I have no problem at ordering z-wave or zig-bee products from china or Taiwan, as they fall cheaper and does the work. please get to me asap. thank you.

The Smartest House has a lot of inexpensive zwave products and their website says whether or not they’re compatible with SmartThings.

They also include links to the community created device handlers they’ve tested for the products that require them.

my smart thing hub is from UK, the smartest house website doesn’t have much Variety on UK devices. can you please help me out. with it. Thank you.