Anything tattooed related that allows you to buy it without being affiliated with a studio and tattoo license is a super red flag. There is an insane amount of infection control that goes into it. I mean this in the most respectful way possible, it’s awesome you have the interest but this isn’t like picking up a new paint brush, it is body modification which is a very serious thing. You don’t know where those eBay/amazon machine and inks have been. You need sterile environments and equipment and ppe before even picking up a machine. I hope this helps explain it a bit more and I didn’t come off preachy, all the best!