You won't need much up-front cash to buy all three of these great stocks.Warren Buffett has amassed a cash stockpile of nearly 277billionforBerkshireHathaway.It′sfairtosayhedoesn′thavetoworryonebitaboutthesharepriceofanystockhebuys.Somepeopledohavetoconsidershareprices,though.There′sgoodnewsifyou′reinthatgroup:BerkshireHathaway′sportfoliooffersseveralgreatideasforcash−strappedinvestors.HerearemypicksforthethreebestBuffettstockstobuywith120 r ...