I have current versions of every significant used-gun book on the market, and I can find no reference to a Remington Model 58 pump shotgun. Remington’s very first pump was sometimes known as the Model 1908; is this what you’re talking about? If it is, then $200 is a fair price, especially with an extra barrel. Be aware that American shotguns made before 1930, even if made of modern steel, often have short chambers that can create excess pressure with modern ammo. Take it to a gunsmith to find out. He shouldn’t charge more than $10 for the measurement. Whether you should buy it or not depends on several things: How badly do you want it? Have you paid your rent? Do you have $200? In other words, it’s up to you.