Thank you for contacting Mearto. These are ostensibly 5 prints by the artist Carle Vernet. I see some indications in your photos that these prints are not authentic:
On your print, it says “depose a la direction”, which is missing the accent marks.
Should be: déposé à la direction
Please see my link below on this issue.
You haven’t included photographs of the actual prints; their market value is also dependent on whether the paper is in good condition, or whether they are nicely framed.
Authentic Vernet lithographs can sell for $1000 to $5000 per print. However, even if inauthentic, they are still nice decorative art pieces. Since I think these are inauthentic, I am giving them a Fair Market Value (for all 5) of $80 to $100 based on sales of similar items.
If you click open and look at the 6th image, you will see what I mean about the accent marks:
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