There's like 100 different types of conures and the care/personality traits differ from one breed to another.
I am personally a fan of green cheek conures. They are smart, very tamable, bond very close with their human, able to learn to mimic speech and best of all NOT LOUD. Many conures can be very very loud.....and so can green cheeks but they only scream if they're very excited or scared. Their normal chatter is very low/quiet, with some clicky sounds and sounds that can resemble mumbling.
As for the 'cheap' conures...different breeds have different prices but none of them are 'cheap'.
Here's my green cheek showing off his tail
