I checked the Thousand Oaks Optical site and they have a list of legitimate resellers of their products, and the Amazon seller I used is listed. I'm surprised Amazon didn't do the same basic checks before e-mailing me.
When I was searching for more information after receiving the e-mail, I also found someone on an astronomy forum[1] who is being refunded for a telescope that appears to retail for around $1199.
[1] https://www.cloudynights.com/topic/587658-amazon-eclipse-gla...