What is the price of this coin

[Japoks]

25 ptas year 1957.. 25 ptas year 1980... 50 pesetas year 1980 & 1975

[Conder101]

Your images aren't good enough to confirm the dates on the coin and I suspect you are listed the large date that is under the bust.  (because there is no actual 1957 25 peseta coin.)  That's the date the design was adopted.  The actual dates are found in tiny numbers punched into the stars on the coins.  None of the "1980" 25 peseta, or the "1975" or "1980" 50 peseta coins are worth more than a dollar or so retail.  The "1957" could be worth something if it has a BA, or 61 thru 67 in the star.  The BA is good in any condition, the 61 has to be at least XF, and the other have to be uncirculated.  Other wise that coin is also maybe a dollar retail.