Hi guys n gals, do you have any good air purifier to recommend that is good but not too pricey as well?

wife keeps saying she wanna buy the Amway one, but it costs a bomb! RM4k+ one! I wanna do research to see if there's others that is similar/better than that? I'm sure we can get a pretty good air purifier that has several layers to clean the surrounding air without forking RM4-5k right??