Yes, you CAN sometimes find prom and formal dresses at thrift stores! In fact, I use this strategy all the time to find inventory for the ModestProm Rentals store. Dresses will often require alteration, and you never know what you’re going to find, but sometimes you’ll get a super bargain.
Here are some videos of me discussing my Thrifted Prom finds!
12-23-16: Two short dresses and a long dress