It appears that the average audio show system price is easily north of $20-$25K, with some in the $100's of thousands. My system was put together from online research, studying, and auditioning gear in my own home. There was a fair amount of trial and error, shipping back and forth, buying and re-selling (used gear ... sometimes for a loss); but eventually I got there. My recommendations represent a kind of "if I knew then what I know now" approach.
So, what's the point? I almost dreaded going to that first audio show. Actually I was worried that - given the somewhat addictive nature of this hobby - I might leave and feel like taking out a 2nd mortgage once I got home. My actual experience was the opposite of what I expected. Maybe it's just me, but a lot of what I heard at those shows (and from some very high-end, high dollar systems) sounded like exceptional "hi-fi". Very little sounded like music. Following a few such experiences, I became more satisfied with my own rig. Go figure.
Note: I too, will not comment further the merits of audio shows. This is just an account of my personal experience. If someone else wants to weigh in, great ... but that's it for me.