For anyone looking for a single-stacked SIG in 9mm (and doesn't mind going used), the old 225 may be a viable alternative. I've seen them at Turners for about $450. AIM shows them for $259.95
AIM Sig Sauer P225/P6 9mm Pistol Sig Sauer P225/P6 9mm Pistol
---- P239 ------
Length, overall 6.6"
Height, overall 5.1"
Width, overall 1.2"
Barrel length 3.6"
Rifling twist 1 in 10"
Rifling grooves 6
Sight radius 5.2"
Weight, w/o magazine 25.2 oz.
Magazine capacity 8 rounds
---- P225 ------
Length, overall 7.1"
Height, overall 5.2"
Width, overall 1.3"
Barrel length 3.9"
Rifling twist 1 in 10"
Rifling grooves 6
Sight radius 5.7"
Weight, w/o magazine 26.1 oz.
Magazine capacity 8 rounds