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FWIW, there's no such thing as a Winchester Model 1896 shotgun made in 1924, or any other year for that matter.
AFAIK, The only Winchester shotguns made prior to 1964 were:
* The 1879-ish SxS's imported from England
* The Model 1887 lever
* The Model 1893 pump
* The Model 1897/97 pump
* The Model 1901 lever
* The Model 1911 self-loader
* The Model 12 & Model 25 pumps
* The Model 36 & 37/370 break-open single-shots
* The Model 21 & Model 24 SxS double-barreled guns
* The Model 40 self-loader
* The Model 41 boltgun
* The Model 42 pump
* The Model 50 & 59 auto-loaders.
Most gunshops will tend to evaluate guns very low - in case they want to buy.
The best way to assess value, besides putting one up in a widely-attended guns-only auction, is to surf "sold" gun auctions only, for similar models in like condition, to find out how much somebody's actually been willing to pay, for whatever - recently, not whenever.
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