I am selling 52 cases of 750ml bottles.  These are european Methode Traditionelle champagne bottles built to withstand high pressure but are perfect for bottle conditioning.  I bought a palet for my now defunct nano bewery.  I paid ~$2.52 per bottle after tax and shipping.  I am selling them less than $2.00 bottle. 

https://www.waterloocontainer.com/product/methode-traditionelle-w106-green-champagne-green-crown-750ml/