Has anybody tried these eBay chip programmers? I know I lost my only key a few years ago and did hours of research trying to find a way to program a key, and came to the conclusion that the only way to do it was to have a locksmith or dealer program it.
Now I lost my master key, I still have one that starts the car, but want to get a new master key programmed so I can make new keys, and this eBay listing for these programmers seems kinda too good to be true.

https://www.ebay.com/itm/New-Toyota-...Condition=3000

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The listing carries a 30 day money back guarantee. Even if it doesn't work, you're only out the return shipping costs. First class mail would probably be less than $5.

Here's a link that claims no special tools needed. A video link is included. Also has text instructions should you prefer to print them out. Good luck.
Scion tC Key Chip & Remote Fob Programming Instructions.