glass bottles

Hi all, sorry if this is in the wrong place to post. New to the forum... Just would like to know where a good place to buy "cork" wine bottles from, new or used. I've been on ebay and FB market place and had a few good hits but I find supply a little slow. In an ideal world I'd like all the same...

I've noticed after many uses some of my glass beer bottles are looking a little grubby on the inside. I was wondering if anyone had considered using an ultrasonic cleaner - Vevor cleaner or is the cost here just too much ? Any thoughts, experiences ?