For $700, I would grab it up. The barrels alone are worth that. The gun itself a freebie!
I just bought a 4" 15-2VH for $375. It's about 30 years old, and is in great shape. I grabbed a 6" VH barrel too, so now I have a 715 with 4" and 6" barrels and the 15-2 with 4" and 6" barrels too. I bought the 715 for $269 in almost new condition in 2005, and the extra barrel was a whopping $62. The $375 for the gun and $177 for the barrel shows how the price of DW stuff has taken off.
Personally, there is no revolver made that I would pick over a decent DW.