Typically, these silver retirement case cards are selling on ebay for around $80 to $120 each.
Peter Wallace is on the lower end of that range, but for your card, being a premium number (#1), you could be looking at $125 or more.
The card condition looks great, so i would probably be asking for $125 as a starting point. His jersey numbered card (#9) might also attract that price range, but any other silver retirements of his would likely be around the $80 amount.