Here is a blue gown, also circa 1915 - it's in rougher shape than the pink one and cost less than $10! The trim is really interesting, as is the construction.
There are several collar stays:
This is a 30s nightgown. It has sweet embroidery and the the way the insert lace is done is really pretty:
I also got a bodice from 1895 for $5, and a 1940s wedding gown for under $10 - I haven't taken pics of those yet though!