Hallo and a warm welcome here on board of our forum
I hope I do not demotivate you, when I comment this model - off course it is my personal opinion, maybe a specialist would say something different
The model is nice and represents a good made example of a decoration model.
More details than normal and seems to be relatievly good build.....
but it is not 250 years old - maybe the seller told your mother this story in order to sell the model - they are still offered but best time, when there was ahype was 30 or 40 years ago
These models (often it is the Santa Maria because somehow everybody knows the name of the ship) are mass produced in Asia (f.e. India) - it is somehow folk art
with google lens I made some research to find exactly your model, but failed - but there are so much similar ones
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Discover how Lens in the Google app can help you explore the world around you. Use your phone's camera to search what you see in an entirely new way.
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f.e. this one
View attachment 472863 View attachment 472864
offered for 95 Euro, but not sold until now
If you can sell this one, you have to try to sell it in your region, careful packing and postage would cost more, than you will get for the model
In germany and austria they are offered for 50 to 100 Euro - but I do not know, if they sell it for this price
Sorry, I am very sorry, that I can not give you better news