i am thinking about investing 60 dollars in a digital model of casio(i dont work and am not rich just got the opportunity to buy it now for this price)
there are also analog models for half the price.
or i could invest in a low end one which ranges from 20 to 5 dollars.
whats the best wise consumer choice?

You should contact the suppliers directly and inquire from them. I suggest you http://www.hellotrade.com/dutjeck-industries/ or http://www.hellotrade.com/time-weather-instruments/ where you will find the list of suppliers for wall clock. Its free to contact these suppliers.