Context
With $ 1.000.000,00 (an aguinaldo or accumulated savings) the rate you choose changes the result by several dollars.
For historical reference: a week ago $ 1.000.000,00 bought US$ 643,09; a month ago, US$ 645,16; over the last 30 days, between US$ 634,92 and US$ 647,25 (daily selling data from argentinadatos.com).
Keep in mind: It is an illegal, unbacked market: the published price is a reference average and each trade may vary, plus there is a risk of counterfeit bills or scams.
The other way around? Come in. blue dollar a pesos.