Sadly I am giving up hope and am selling the houses I have. I had planned to use them on conservation lands, and don't own property myself that could house martins, but the last of my hope has died (and even the bluebird boxes will be coming down). Located in Cambridge, Ontario But I can drive them to Milton or Burlington if needed since I work out that way. Maybe someday I may be in a different situation but right now I need to let go.
One wooden t4 style with pull out trays - asking 150$ (I bought it used)
one aluminum 12 entrance (original 6 inch cavity). asking 40$
I'll take photos tonight or this weekend. If no interest here I'll post to kijiji.