I think it would depend on the couch in question. In general used uphostered furniture is a huge bargain. I think if one goes to the home and inspects in person, one would get a good idea of the kind of household it was. If is is stained or odiferous, then don't buy it. In general - not always - a good quality sofa is simply more comfortable to sit on. And often the fabrics used are more beautiful. That of course depends on the sofa. Of course it is easier to go to IKEA and order a sofa versus taking some time to track down used sofas which may or may not pan out. You probably wouldn't be able to take home a sofa the same day unless you were incredibly lucky in terms of finding a used style you like. I would assume that these sofas are place holders while you wait for the sofa . you actually want to come into inventory.

A 3-seat sofa and two comfy upholstered armchairs are your best bet for comfort and flexibility. Second option would be a reversible chaise sofa and one chair. The chaise that flips from right to left will give you many more options for arranging the room. Cornering furniture eats floor space, and says you don't really have room for your stuff. I would eliminate the cornered armoire or place it where it can lie flat against the wall. Maybe it would be useful in one of the kids' empty bedrooms. That will open the possibility of some window treatments that will soften and cozy the space.

You’ll have to add pictures of the room, and ideally a floor plan. Otherwise there is no way to suggest anything that goes with your current items.

Sorry not sure what you are asking. I see a sloppy sectional already there is it staying? Waht are the other rooms like and the pieces in them. I dislike sectionals they are IMO the most expensive way to buy the least number of comfortable seating Can at least post a to scale plan so we know how much space you have and also a lot mor einfo. Post all of the here in comments DO NOT start another post. How many seats do you need what is your style ?