https://www.tractorsupply.com/
on line sales - scroll down for brands available online. 3 tubes, plus shipping, $37, enough to treat 1250lb body weight per tube
https://www.tractorsupply.com/?cm_sp=Header_Nav-_-Links-_-Logo
Whoa, Amazon (USA at least, sorry Canadians!) is still the better online ivermectin deal. I think it’s $26 or so for 3 tubes, including shipping. (I was grousing because I got 1 tube for $6 some time back.)