Not all second hand (plus) pets are terrible. Not all come with baggage. Sometimes, good pets have to find new homes because owners have to move, they have passed away, there's been a tragic accident or for some other reason.
I've never had a hand raised conure before, but have adopted two. My first conure wasn't very hands on and he had health problems, but we still had a special understanding of each other. My second conure has been the complete opposite! He's friendly, hands on, noisy, goofy, hilarious, cuddly, bratty, etc! He is extremely trusting of me and there are things I can do with him that I could have never done with my first conure.... one includes laying him on his back and gently tossing him in the air. He is the epitome of the word 'conure', and he is everything I expected of a hand raised conure! Only, I've only had him for about 6 1/2 years and he's around 19 years old.
I would love a hand raised conure! I'd love to experience that 'young conure' behavior! But I'm drawn to adults... and am in the process of adopting another conure who's 10 years old and probably the youngest conure to be adopted, and probably will be the youngest flock member now. She is not trusting of humans and has some issues, but that's ok. I have more experience with adult parrots with trust issues than I do young birds!
If you are thinking about adopting/buying an older bird, before you turn that bird away, just go and interact with them! Maybe you'll form a bond or some sort of connection! Don't be afraid to try interacting with an older bird. If you decide an adult is not for you, well, that's fine, too.