We used to have furniture shops and found that although items were labelled “M&S” etc they’re mainly made at the same generic factories. Most sofas came from the Welsh factories and everything else was mass produced in the Far East.
The only exception being locally built pine furniture and bedsets/mattresses.
Don’t be fooled into thinking you’re buying quality by shopping at the like of John Lewis etc. You could be just as likely to find a similar quality at a discount store. We used to sell M&S tables priced at 50-75% lower than they did.
For real bargains, head to the furniture show at the NEC. Some wholesalers/manufacturers will sell in small volume and to individuals or point you in the direction of an agent. You may have to hire a van to collect items from a wholesaler but it’ll be worth the saving.
We had an arrangement with a wholesaler in Lydd, Kent who used to stock the bigger stores but would let us take van loads of stock on a pick and mix basis.