Dry-cleaning cost

what is the most you ever pay to dry clean one single piece of clothes? I know dry cleaning a wedding gown may cost up to $1000 depend on the fabric and where you get it done as well, but what is the most you ever paid to dry clean one simple dress? I went to DD French in Dallas and they charged me $50 to dry clean one dress, and yes one dress. Because I paid a lot for the dress (it's a simple white cocktail sheath dress by Jil Sander that I wore recently and wanted to get it cleaned) so I didn't want to risk having other cleaner ruining my dress. I guess couture dress needs couture cleaning service. It's like the cost for some people to buy a brand new dress.