I saw one at the gun shop, I've never heard of this and info seems light

they are asking $680/used, but tweaked by a smith.

s-r

They were offered in three different trim levels, as below.  If it hasn't been hacked up or had the hell shot out of it, that's probably a pretty fair price.  

Custom Tactical Model, Level 1: features extended nylon triggerwith over travel adjustment, Colt Commander hammer, slim tactical ambi safety lock, Novak carry rear and Colt front three dot sight system,upswept wide grip safety with palm swell, beveled mag well,flat mainspring housing and Double Diamond Rosewood stocks. Targeted to no more than 3" @ 25 yds. MSRP $730

Custom Tactical Model level II: Features Videckilong solid aluminum trigger with over travel adjustment, Colt Enhanced hammer, slim tactical ambi safety lock,full length guide rod, Heinie combat fixed sight system, custom fit upswept wide grip safety with palm swell, beveled mag well, flat mainspring housing and Double Diamond Rosewood stocks. Targeted to no more than 2.5" @ 25 yds. MSRP $935

Custom tactical level III: Features long solid Videcki aluminum trigger with over travel adjustment, match grade hammer, slim tactical ambi safety lock, full length guide rod, recessed Bo-Mar adjustable rear and Heinie dovetailed front sight system, custom fit upswept wide grip safety with palm swell, funnel mag well, flat checkered mainspring housing and Double Diamond Rosewood stocks with Custom Shop Medallion. Targeted to no more than 2" @ 25yds. MSRP $1350