Rotated Coins 1952 Half And 1935 Dime

Hey

Was going through my dads coin collection today and found two coins,

not sure if they are in the right section, but they are 60 years and 76 years old respectively so I thought they would be classic.

Both these coins I presume are errors, as the faces are rotated 180 degrees, or just shy, possibly 175 degrees.

first is a 1935 Mercury dime, this coin looks perfect, has slight dark dicolourisation, but the detail is amazing and the branches/leaves are perfect.

second is a 1952 half dollar in good condition, but you cannot see the inscription on the Liberty Bell as a reference to quality, the crack is still visible. there are no dings or deep scratches, just looks used.

I'm trying to find a value for these coins, I found one website (http://www.rotateddies.com/) that listed many rotated coins nut I could find neither for the ones above. The closest was a 1941 Mercury dime 180 degrees with a rarity stated between 80 - 200 examples. and a 1961 Franklin half at only 90 degrees, with a rarity stated between 4 and 12 examples.

Can anyone point me in the right direction, tried ebay, google, etc.

thanks

took the double sided pics with a mirror if you were wondering.