I'm combining an A700 that has seen perhaps 10 dives with a new, never-wet Mk25EVO that came with the D420 set I bought some months back. Since I'm now using Mk19's with my D420's, the Mk25EVO just won't get wet. The A700 works perfectly, but I'm playing with too many other regs right now.
The Mk25 locks up at 136 psi, and the A700 cracks at 1.1". The first stage, being new, is flawless. The A700 has trace scuffing on the adjustment knob and faceplate and was recently serviced. See pics.
$700 plus shipping ($20 insured CONUS; US$35 insured to Canada). Save yourself almost $300 on one of SP's top models.

The Mk25 locks up at 136 psi, and the A700 cracks at 1.1". The first stage, being new, is flawless. The A700 has trace scuffing on the adjustment knob and faceplate and was recently serviced. See pics.
$700 plus shipping ($20 insured CONUS; US$35 insured to Canada). Save yourself almost $300 on one of SP's top models.






