I'm thinking between $850 and $1000. The 4 and 5 inch barrels are more popular than the 6.5", and some people prefer the fluted cylinder over the unfluted cylinder. I believe the no dash version is slightly more coveted than the other versions because fewer no dash models were built. But pre-lock guns still bring a slight premium and tend to sell quicker than those with locks. Check out the "Guns for Sale" forum here, you will see that a 5" no dash sold on this forum recently for $1200. The 6.5" took a little longer to sell.
I recently purchased a 5" no dash model, that I will use for ICORE competitions this year. Most 610 owners marvel at the accuracy of these guns, and I completely agree. Even though you can turn your gun around for a quick grand, I recommend taking it out and shooting a few boxes of ammo through it. You might just decide it's way to accurate to sell.
