To Reject an MTA quote (before purchase), enter the MTA quote’s results page, by clicking view of the desired quote on the search page, and then click the Reject button. This will prompt a small pop up to confirm the rejection. Clicking Yes proceeds with the Rejection.

The page refreshes and displays the last bought policy of the given quote. 
You can scroll down to see past policies and also rejected MTAs (quotes).

(After reject success below, displays recent policy with rejected quote below)

(Scrolled down results page of a MTA quote, showing rejected quote)

Viewing previously rejected MTA quotes

To view other rejected MTA quotes, search for your desired MTA quote or Policy, view their results page and then scroll down to see their previous policies, quotes and rejected quotes.