Some folks have a personality such that if they spend that much on a gun they're afraid to use it as the tool that it is.
Folks like this often find that SIGs end up staying in the safe (they're just so nice ) while the Glocks get used as the beaters and daily carry guns. I've seen it on more than 1 occasion.
I wouldn't necessarily shy away from a used Sig. They really only get better as you shoot 'em. I bought mine used for $515 and it has always been a great shooter. Also, a 229 is more compact and I'd have to agree, more comparable to a G19.