I have got a yellow male canary and a yellow, green and white female canary for rehoming. The fee is $80 each. Cage not included. Do not have to be re-homed together. Absolute minimum cage requirements for canaries is a 30x18x12 inch enclosure. Larger is preferred.
They were kept in the same cage together, but the female follows the male around pretty relentlessly so they needed to be separated. In an aviary, they would probably do fine together.