Is it better to buy a sofa at home or an expensive one?

That depends on your living room space and your own preferences. The two sofas you mentioned have their own advantages and disadvantages. 1+2+3 is relatively more flexible, with more combinations and arrangements, stronger adjustability and adaptability, and greater flexibility. The sofa of the imperial concubine couch is popular at present, which is more comfortable and atmospheric. Another advantage of 1+2+3 is that sofa cover is easier to disassemble and clean.