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Gilbert Mainesvintagecarddprices.com contains an exhaustive inventory of OJs and scans and prices realized at auction.
gfg.com also has an exhaustive inventory of OJs and scans and prices for the scanned cards which are available for purchase.
The former is a searchable database with information on many sets and prices. But you have to pay to "join".
The latter is a seller of OJs and other cards.
But in general, the values which you cite are way, way low.