That current price on ebay is good $202, but it is also 3 days till end of auction.
As far as I know, vonage does not directly support the 7960. I am sure there are those that can make it work.
With vonage you don't have to buy the cisco ata 186. They send it to you free.
After I placed the order, I called them, and they charged me $17, which I gladly paid to have it arrive the next day/overnight.
I am curious, what are Cisco ATA 186 going for on eBay?