KSC MK23 GBB

Old first gen KSC MK23 GBB. Selling because I have two and this one just sits in a box. She shoots but it's a collectors item, not for regular Airsoft. It's atleast 20 years old, perhaps 25 even. 

I can include a 2nd mag but the output valve is broken, regular Valves fitting KSC/KWA HK45 fits this too. See last picture, mag is gastight despite the valve looking like that. Open to sensible offers.