If the 45-70 is a good rifle, it is probably worth more than the .357. The 1000 rounds covers the revolver and then some. I’d do it if I couldn’t just buy it outright.
Every rifle in the deal is mint and the revolver is mint. All 1970’s era. The 1000 rounds of ammo is what makes the deal sweet. But I love having a pistol and pistol caliber carbine in the same same caliber. I am going crazy trying to decide on this.