Hi proofreader2000,
You could do both or either one (on a hanger or on a real person) so long as you take pictures from different angles to give buyers a good look at the dress. Close-up shots of certain parts of the dress will also be nice, like to highlight beautiful detailing...
Also make sure that your description is accurate and describes the dress in its true condition - this helps avoid any complaints from the buyer that the dress is not as described on your listing.
I suggest taking a look at similar items on eBay and completed listings, and see whether there is a market for what you've got. You could also try selling it at your local flea or car-boot market, where a lot of pre-owned (used) clothing lovers go!
Hope this helps! All the best
