In western countries you could get at most 2-3 man days for that money, I highly doubt that even the best coder could implement Highcharts in 3 days and provide support for it afterwards.
If all you want is one or two simple charts then I agree, it is a waste of money to buy something like Highcharts, but if you really need most of what it has to offer then it is a good investment.
I have integrated Highcharts into a commercial project and it was a success.