It depends what you call a good price? Your dress doesn't have to cost the earth. Try ebay for ideas, or a google image search. Oxfam online, TK Max, Shein? Just wear something you are comfortable in, and are happy being video'd or photographed in. Enjoy the ceremony. You have earned it, and it really is a celebration of all that hard work, of surviving long nights and worry, wondering if you will ever get through. It will probably shock you at just how many delegates there are for each ceremony. Hoping you can find something that you makes you feel good.