Hey LTDB,
The VivoKey Flex One is listed as $1000, but that is just a placeholder because the product is still in a private beta testing phase. The final cost will likely be much lower.
As for what you can get done, there are many options. Since you’re interested in that keycard you use for access control, I’d recommend you start by figuring out what frequency it is operating at. Once you figure out the frequency you can select an implantable tag that uses that communication protocol.
The two most likely frequencies are 125kHz and 13.56MHz. You can download the NXP TagInfo app for your phone, turn on NFC, and attempt to scan the card to determine if it is 13.56MHz. If it works, you might want to look into the xNT or FlexDF tags. Although you won’t be able to directly clone the card onto your tag, you may be able to enroll the tag into the system that manages your access control and use it in lieu of your card.
If your phone is unable to scan the card, it’s likely operating at 125kHz. If that’s the case, you might want to check out the xEM tag. It has a feature that allows you to use a device to clone some types of access control cards directly onto your implant.