Information about my 3 coins

Hi there ! I have 3 coins, I don't know a lot about them. I went to a local antiques store and he said that the coins are real not fake - and he offer my father about 500 euros for all 3 of them. Online I found the coins, but a lot of people said that I should check them on sites. On the Victoria Dei Gratia the small number on the other side of the year is 29. My family has this coins for a long time and we don't know their real value. A lot of people tried to scam us by saying different stuff like that the coins worth nothing more then their weight. I would appreciate any kind of help. Thank you.

One half sovereign and two full sovereigns. The best way to check authenticity is to check the weight and size. If they're the right diameter and weight then they're likely to be genuine. The value is usually around the melt value of the gold, unless it's a rare year.

https://en.numista.com/catalogue/pieces5760.html
https://en.numista.com/catalogue/pieces11461.html
https://en.numista.com/catalogue/pieces13219.html

the first coin is : victoria dei gratia from 1864 and on the other side below the coat of arms there is a small number : 29
the second coin: regina f:d elizabeth II dei gratia is from 1968
and the third one: Victoria dei gra britt regina fid def ind imp is from 1896.

Yes, I have included the links to the three coins in my previous message, just click on the links. The "29" on the first coin is the die number.

i ve looked them online nad the prices are very difrent ,there are from 300-400 to even 1000 for the first one ,if i would sell them how much should i ask? a fair price? also i want an advice,should i keep them?

It's completely up to you. I would keep them because they're nice coins, but if you do decide to sell them, here are what their book values are. If you start them off at that then the market will decide what they're worth

https://www.ngccoin.com/price-guide/world/great-britain-sovereign-km-7362-1863-1874-cuid-123031-duid-315365
https://www.ngccoin.com/price-guide/world/great-britain-sovereign-km-908-1957-1968-cuid-43195-duid-124085
https://www.ngccoin.com/price-guide/world/great-britain-12-sovereign-km-784-1893-1901-cuid-43173-duid-123984