[COLOR="Navy"]havard:
The location of the spurs for your model bass drum looks alright. You simply need longer spurs. Up until 1964 the spurs for this mount, and the ones contemporary to your drum, were longer at 12? inches, and thinner at 5/16 inch diameter. The later version spurs, which you have at the moment, were shorter at 11 inches and thicker at 3/8 inch, respectively. Originals of the earlier version are a little bit harder to find. But Jim Petty has what you need:
http://www.jp2creations.com/
Click on parts, bass drum spurs and scroll down to the 50's Slingerland version. You might measure to be sure of the length you need, contact Jim and check the length of what he has in stock, to be certain. But he is very helpful, just tell him what you are looking for.
The snare drum you reference is still being sold, and is a 1957 Super Gene Krupa Model #150 in 5? x13. The drum was cataloged as having a solid shell but after 1956 Slingerland made most of them with a 3-ply shell, mahogany interior. It's a relatively rare model, and all the more rare with the aluminum hardware.
http://cgi.ebay.com/Slingerland-13-Radio-King-Snare-Drum-Rare-50s-BDP_W0QQitemZ290131679382QQihZ019QQcategoryZ38095QQrdZ1QQcmdZViewItem
Now I generally make a policy of not commenting on the monetary aspects of someone's auction. My feeling is that whatever someone wants to get for their property is their business. And whatever someone is willing to pay for an item and then what that item sells for is what sets the value. Having said that it is undoubtedly obvious to most folks that this drum, a treasure, is priced to sell to a drummer who really wants it as a keeper, and not for someone thinking of turning it around and re-selling it.
Happy hunting!
DrCJW[/COLOR]