It’s worth what you are willing to pay for it. I have a 72 saddle ring 30-30. $700 is high, but I wouldn’t take less than $600 for mine. So, it all comes down to if you want it to keep, not to sell and make money. If you are gonna keep it and use it for 30, 40, 50 years, paying a hundred or two more than ones worth won’t matter decades from now. But, I bet you can find one a lot cheaper than $700!