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Jim VBI'll try to send you a copy of the pricing page from the SCD Standard Catalog.
Your cards look to be in about VG condition (perhaps only G, hard to tell exactly). But they still have the coupon attached, which is important. Without that coupon they would only be worth $65-$75 each. Having the coupon increases the value 4-6 times that.
You might be able to get more than that by having them professionally graded.
You have actually posted this question on the board for Vintage Memorabilia. I'm going to post it on the board specifically for Vintage Baseball Cards. That should get you some better answers.