MSRP is also for those who want something that simply cannot be had for any discount...unless you buy used.
There's all sorts of specialty stuff that falls under that blanket. For me, it's smaller boutique brand watches. Tell me where to get an Ocean7 from anywhere other than Ocean7, or tell me which of the few ADs they have are selling Bathys for anything other than MSRP, especially considering the demand. You don't find a lot of price fluctuations in the watch world. Yes yes, there's some of course, but they're so widely known as to be no secret. The only way to get some kind of good deal that no one else can get would be to not buy from an authorized dealer, which would be really stupid.
I also wouldn't buy bargain basement body modifications, but that's just me.
I wouldn't buy a bargain basement pet either. If the pet was inexpensive, then it would probably be a rescue case. If it's a rescue case, the price didn't factor into the choice. In fact, price doesn't factor into the choice regardless, other than knowing the going rates, and what you can't go above.
I just refrain from judging how much someone paid for something, because remember, this is a headphone forum. Because we all agree that headphones are cool, we tend to get into a groupthink and think everyone else is weird. The truth is, people outside this forum would judge us, and we don't like that, and we make fun of those people.
So I won't judge what someone else is willing to pay a lot for, as long as it's legal and doesn't hurt anyone.