"I am desperatly trying to locate a source to buy long baggy sleeve ballroom/latin dance shirts for men. I can only find the competition styles and they are way too expensive for me, and a bit too flashy as well(Im in my early 50's)
Can anyone please give me some suggestions for some moderatly priced, good quality shirts? I would love to find them in various forms and styles of black, but am also intersted in other colors as well. I am anxiously awaiting your kind responses! Thank you very much...."

You will have a lot more luck if you don't think of them as ballroom items, but instead shop at a performance dance / theater store or website.

The white version is sometimes called a poet/peasant shirt. Of course you probably want one of the less over-the-top versions compared to some that come up in searches.