You are looking at the off-the-rack dresses in Canadian $s (which are low compared to US presently). If you are in the US, divide the price by 1.4 to get a US$ version.
Based on what I've seen in shops here, their dresses and training wear is very nice quality in terms of materials and workmanship. Montreal is known for fashion in Canada and EliteXpression's atelier is conscious of its reputation.
The custom dresses vary a lot in cost based on materials according to the news stories. The most expensive dress they ever made was Yuna Kim's crystal-encrusted Olympic costume.