So, unless you have some burning interest to learn about RFID and invest a fuckload of time and money, or you know someone who has, I would recommend you just pay the apartment complex's $80 fee (or whatever stupidly expensive price they are asking for your card) for replacement or additional keys. It will probably be cheaper than buying the equipment.
I cannot really afford to spend that much time and / or money.
(some of the items are not in the UK, need to ship from China)
Although some very old card types can be copied, almost all of the modern ones can't be. So, you couldn't clone the card number onto another card.
The reason most locksmiths struggle with this is that they have proprietary equipment that is specific only to particular manufactures so they don't hack it, they use a expensive paid proprietary service to clone the fob.
Do you have an experience with cloning keyfobs?
I'd be infinitely grateful if someone could show me how it is done...
(working together = accelerated learning)
Michal
0758 629 4279