Test 2-3 days with your margin. If you sell with 15$ and the product is 5$, try with 10$ budget daily to see if you at least make a sale.
hahah $1 won't even get you a like reaction on a conversion campaign, you need higher budget
I don't think that would be a good ideaIs it a good idea to test with $1 a day
minimum 25$ per day is best recommended