bm dress websites/stores?

Azazie-Kaitlynn style

Hey guys!! 2 of my bridesmaids just ordered (and one received) their BM dresses!!! They're Lulus ones. We found them on Poshmark used and I'm so excited they didn't have to pay full price. My SIL is borrowing a dress that I already own as her BM dress. Totally enjoying the on going theme of sustainability. (My wedding dress is preowned and our invitations are made out of seed paper that can be grown into flowers or composted)!

Right now I'm working on finding a dress for my younger sister. Her color is purple/plum. Which is simple enough. She does want it off the shoulder though. We're doing floor length dresses, chiffon/flowy. Somehow I haven't been able to find anything that's less than $100. She likes one of the styles on Azazie (off-shoulder) but that $100+. Any suggestions for other sites? I've looked on the sites for stores like Kohls, Macys, JCPenney, Dillards. Found a couple of Amazon but I want to use that as a last resort. Nothing so far on Poshmark or Mercari. JJ House is the same price as Azazie. Lulus doesn't have off the shoulder that isn't tight/form fitting.

What am I missing?

thanks guys!!!