Your experience is consistent with other anecdotal evidence I've heard. I think Arlington - under new ownership as of several years ago (pre-Covid) - is being a more price aggressive to make up for their bad reputation under the previous ownership. Chantilly, I believe, is under same ownership as Tysons and both have a bit of a reputation for price gouging, especially relative to service. I bought my GTS from Bethesda, but my service dealership is Silver Spring, where I bought my previous Cayman S. Past quotes I got for service from all of the Virginia dealers were 30-50%+ higher than Silver Spring, and I've found the quality of service at Silver Spring is better than any others in the DC area. Just my experience.