I would like your opinions on this,

. I just don't know what to think.
I sold one of my Blue Headed Pionus chicks a couple of weeks ago to what I thought was a great home, I delivered the chick myself and checked that everything was ok. They had a great cage with lot's of toys and asked loads of questions on what the chick liked to eat. They rang me the day after I took the chick and said they thought it was great. I rang them last week and everything was still good, they needed to work on stopping the chick landing on their heads but apart from that, it was good. I said ring me if you need help or any advise, like I always do.
Yesterday I noticed an advert for 'my' chick, they're asking more money than they paid. I can't get an answer by phone or e-mail. Does this seem odd to you guys???? I mean they only had her two weeks, it can't of gone that wrong in such a short time?????? I hate to think they just bought the chick to sell on!
Ekkies