I have just phoned the dress makers after a year of them having the dresses

to repair the hems. They still have them and I am collecting them next week - four of them. They had my number written down wrong so couldn't call me.
What would you suggest is the best way to sell them? I need to have a clear out, and the extra cash would come in handy for the baby. There is the bay of e but second hand bridesmaid dresses don't seem to do so well on there, if I try and sell them on there - what do you think is a reasonable price? Do buy it now or just auction?
Any other suggestions?