Yes. I understand why the labor cost is high. I have never hemmed a ballroom gown, but I have worked with silks and satins plenty -- fabrics that can be SO hard to work with. I'm not suggesting that the cost of hemming should be cheaper. I'm suggesting that one can get to a point of diminishing return, when buying a dress. If I were to pay, say, $3000, for a resale gown, $300 for alterations might seem entirely reasonable. If, OTOH, I spent $400 for a resale gown, $300 might seem a bit much to pay for a few inches of added length, especially since I'd be unlikely to recoup the cost of alterations from a low-cost gown, if I ever decided to sell it. Make sense?