I have a like new Blackhawk SERPA CQC holster for a Glock 23 (& 19) that I have no use for.
Got it in the deal when I bought my last Glock (23), but I prefer leather over this style.
Comes with both the paddle and belt attachments that can be interchanged easily. Secure locking system once the gun is holstered.
The price on the factory package is $44.95, I have seen them sell new online from various police supply companies for about $35.00.
You can buy this one, it's just like a new one as I have never used it, for just $25.00 and $5.00 for USPS Priority mail shipping.
I accept PayPal. Just PM and I'll get back to you as quick as I can.
Here'a a link if you are not familiar with the holster:
http://www.lapolicegear.com/blcqcsehomaf.html