item 220492138293, my bid was 101.9$, it sold for 73$
what happened ?

This is the full message from eBay:

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Attention!
In order to maintain a safe trading environment, eBay may limit activity and request additional verification.
At this time we ask that you verify your account with a Credit Card.
The process is immediate and your card will not be charged.

You could see the same message if you put your e-mail address in Profile section.

Next time, please try to do a "test bid" first (place a minimum possible bid to make sure it goes through).
This way you know if you are permitted or need to complete some verification steps first.