Please forgive me not replying in Portuguese but I wouldn't want to get it wrong!
If you are looking to purchase a used PicoScope then you may have also want to try asking on our FaceBook Group https://www.facebook.com/groups/PicoScopeAutomotive. Sometimes people will have one come up for sale but it isn't common.
You might also consider a 4425 or even a 4423. These are both great scopes and made better by the software improvements but obviously lack the benefits that the 4425A brings with PicoBNC+.