Juniors dresses are sized differently in the 20's-50's. It usually means a shorter torso and less room for the bust. Whoever buys this will either be buying it for a junior or they know how to grade patterns.
For me, any missing piece in a pattern is a disappointment. I will buy a pattern with a missing piece if it is the belt or shoulder pads. A "stay" isn't a huge deal for the right person. A interfacing isn't a huge deal for the right person.
Also, lets look at the dress itself. It's an impressive 16 pieces. Usually the more pieces to a pattern, the more couture it is. But again, that is not ALL patterns. Despite the pattern piece count it is very much so a day dress and a very common look.
In other words, if I was desperate for a dress that looked similar to this, I could easily find it. Which usually means I can find something similar, cheaper, elsewhere.
At a glance, I think this pattern is priced high. But that doesn't mean you should automatically lower it right now. Let it sit on the shelf a while then modestly adjust the way you see fit.
