What I want to do is have a buy it now button somewhere on my site. When users log on they can click it and pay X amount, then after the transaction has completed I need a script to update 1 field in the database with a value.
Someone recommended using paypal ipn for this.
Is that the best solution for what I am trying to achieve?
Will I need some additional script to work with it or is it "ready-made" with just specific database variables requiring changes?