On Tuesday, Jon Heyman of FanRag Sports noted the talks are ongoing, but a "decent gap" remains due to Verlander's hefty contract and Detroit's asking price.
The 34-year-old starter cleared revocable waivers in early August, which makes him eligible to be traded until August 31, per Anthony Fenech of the Detroit Free Press.
Verlander is enduring a down year by his typically high standards. He's posted a 3.97 ERA and 1.36 WHIP across 24 starts. The 2014 season, when he finished with a 4.54 ERA and 1.40 WHIP, is the only year since 2009 he's tallied higher numbers than the current campaign.
The veteran starter put together a much better 2016 season with a 3.04 ERA and 1.00 WHIP and has maintained a rock-solid strikeout rate this season, whiffing 142 batters.
Will Burchfield of CBS Detroit passed along comments from Verlander before the non-waiver deadline about what he considered a win-win situation.
"I guess that makes it easier on me personally," he said. "I definitely would not be upset about staying here in Detroit, and again, because I control my own destiny, it wouldn't be somewhere I don't want to go [in the event of a trade]."
Verlander possesses a full no-trade clause in his current contract, which pays him a $28 million base salary each of the next two years followed by a vested option for 2020 at $22 million, according to Spotrac.
Heyman reported the Tigers are willing to eat some of that remaining money, but they also want a return package to meet the ace's track record, which makes a deal a "long shot."
The struggling Astros might be getting more desperate to make a splash, though. They have gone just 3-7 over their past 10 games and now lead the Boston Red Sox, who are 8-2 over the same span, by just five games for the best record in the American League.
Adding Verlander would bolster a rotation that already features Dallas Keuchel, Collin McHugh, Charlie Morton and, once healthy, Lance McCullers.