877-888-1201

Voicemail claims to be from US Post Office and asks for a call back.  When I returned the call the auto-attended line referred to 'Every Door Direct Mail' company.  I hung up.

This is actually an actual service of the USPS.

See here:

https://www.usps.com/business/every-door-direct-mail.htm

As a small e-commerce business owner, I looked into it to see what the pricing was. Way to expensive for an unestablished business. The cost for one city is in the hundreds, if not thousands, and that doesn't include the cost to print flyers. I don't get why they would be calling now, it has been a few months since I expressed interest and the website lets you see how much it would cost per zip code.

Because they're trying to drum up business. I just sent an email telling them it was too expensive and not something I'm interested in and to quit calling me.