Well, it all depends on what the cards are and if they are real, as to if they are worth it. The vast majority of those types of walkins are reprints and fakes. If real the price seems very low for decent looking Ruth or Gehrig cards, unless they are strip cards. Then if the strips are nice it still might be low. But strips would be in that range. If there is any way you can get some pics and post them or send them to one of us pre war guys, who have been doing it a while, we might be able to help. One thing I immediately look for is perfect centering or frayed corners that have white in them. Which means it's new stock made to try to look old. And the percentage of perfectly centered cards is so small that if you see one in the wild
there is a good chance it's not good Good luck