IF your Revelation is a bolt action 20 g shotgun, its is a Mossberg 385. Value is between $100-$125. Cross reference numbers do not always match up perfectly.
I bought a Revelation R325BB in very good shape a few weeks ago for $65. It appears to have been rarely used.
No sn data available in the public domain.
From the best I can tell, the Western Auto 325BB model was made by Mossberg.
Basically your gun is a Mossberg 385 series bolt-action 20ga shotgun private-branded for Western Auto. New replacement magazines are available, just need to know if your gun is 2 3/4" only or accepts 3" ammunition.
whats the value of a 12 gauge double barrel revelation
value of revelation 12 guage 350 a
310 revelation 20 gauge
Savage
Up to 100 USD
100 or so
Whatever you can get
50-250 usd