Hey guys if you know any good sites to buy formicariums/supplies you can post them here for other members. But be aware of the risks shopping online. I am not affiliated with any of these sellers. Just giving you some ideas/options in buying or making your own besides Antscanada and Tarheel Ants. These might not be the best deals so do your own search. Prices are at time of posting.
$18
http://www.ebay.com/...SEAAOSw~oFXMvfo
$19
http://www.ebay.com/...sd=141989205802
$15-$32 This one is a sliding lid, but not sure how big the air holes are. Not recommended for tiny ants.
http://www.ebay.com/...sd=141989168268