Not that I've seen every deal out there but when I was looking to pick up 40 Tact back in Jan the Service models is what I saw for around the $419 price point, the tacts were all more expensive.
I ended up paying about $470 for mine but I was tired of looking because no one ever had the 40 Tact in stock, ended up getting my XD from Cabela's. Of course I live in the tip of Northern WV and don't have a lot of in-state choices for handguns that offer decent deals.