We ordered ours online from Camping World, it is a mattress only. It comes in two very large boxes, and you must assemble the mattress. It takes some area to do this.
Then, one must figure where to put the pump where it can get power, and the air hoses can get to the mattress. We made some holes on our mattress base to have the pump in the underbed storage area. It wasn't very difficult, but took some disassembly of the mattress platform to figure it all out.
Also an operations issue you need to be aware of. The "sleep number" you like when sleeping will not work when you are not in bed. In other words, once your weight is off the mattress, it's very soft and slack. We change the number to higher to make the mattress firm again once we are out of bed. That way, when you later sit on the edge of the bed to get dressed or whatever, the mattress doesn't collapse. We have one cordless remote, which we share. Our remote does not have a "memory" so you have to remember what numbers to use for "in bed" and "out of bed". Some other models have remotes with memories, to save your settings.
SN store sells residential sets, or bases and mattresses, so their prices/options are probably more/higher overall.