Paying with prepaid / gift card and adress

[gilluska]

Hello!
Can I use gift prepaid card to make purchases on Ebay to gain a feedback?
What about the address? Can i modify my current? For example

original adress: name street number city postal code

modified: nickname, shortcut of street name, number of house written, adding a 1/A block, adding district postal code and city of course same

thinking about p.o. boxes too, but planning more accounts, so would love to try modified adress first