http://www.insidefutbol.com/2012/08/17/they-will-pay-me-so-much-money-liverpool-target-gaston-ramirez-set-for-southampton/67264/
According to this, Gaston would be on circa €3.75m before tax. assuming at the time the exchange rate was £1 to €1.27 ( http://www.exchangerates.org.uk/GBP-EUR-17_08_2012-exchange-rate-history.html ) you are looking at a pre-tax outlay of £2.95m.
I assume he's got some funky tax set up, but in the normal run of that equates to £57k per week Gross.