I've been seeing some really cute dresses around lately that would make lovely bridesmaids dresses at really affordable prices.
Shop Ruche Gardenia Grace Dress. This dress is sold out on the website, but I love how easy this would be to recreate. Purchase a grey strapless dress, sew up some flowers, and lay across the shoulder. Of course, this is a bit of a pain (but with a great payoff!), so below are some dresses right off the rack.
The Limited dresses from left to right: Dinner Date dress; Bow One Shoulder dress; One Shoulder Detail dress
Mod Cloth dresses from left to right: Plum Perfection dress; Quiet Nocturne dress; View From Above dress