Proofhouse.com has a store brand chart that might help.
The Savage Arms Revelation model 115 is worth $150 in good condition. Revelation was a Western Auto name. The Western Auto is really a Savage 46.
25-100
50-125 or so
50-150
100-300
50-300 usd
50-300 usd
Between 100-225 dollars.
Your revelation R310C western auto shotgun is a Mossberg model 500C which was made by Mossberg and Sons for Western Auto.
50-200
100 USD