50 kopecks 2006 Russia M (magnetic), variety Н-1.3, from circulation

M under the horse's hoof – is a Moscow mint mark

Collectors collect circulation coins by year and mints. Ciculation coins cost's higher than it's nominal value, because In some region of Russia can be rare coins with particular year, in other region - other year. For collectors it is hard to be in all regions...That is why collectors buy them to make their collection full.