Context
With $ 500.000,00 (an aguinaldo or accumulated savings) the rate you choose changes the result by several dollars.
For historical reference: a week ago $ 500.000,00 bought US$ 314,88; a month ago, US$ 324,74; over the last 30 days, between US$ 314,74 and US$ 325,52 (daily selling data from argentinadatos.com).
Keep in mind: It is legal and on the record. The actual price depends on the bond, the settlement period and your broker's fees.
The other way around? Come in. MEP dollar a pesos.