Where can i find a small low cost lathe for metal work?

check any used stuff , lathes aren’t cheap , though u can make a lot of money from one

As suggested elsewhere, check out Harbor Freight, either online or at one of their retail stores. They also sell a very cool table top milling machine that comes in helpful for doing metal work. Lets you do things you just cant acheive by hand. I think they sell a lathe and a milling machine in the $300 or so range. They also have several larger and more costly models.