I do! I charge my customers less in shipping cost if I use First Class Mail. It's good for small, light weight products. It saves my customers in shipping cost and it gets there just as quick (sent items East to West in 2 days at times).<br><br>
First Class Mail is often used by Etsy sellers and Ebay sellers who sell light weight items. It's pretty common!
you are taking a risk when you ship internationally first class. The Canadians seem to be able to handle themselves but something about Mexico and South America's postal service seems like a very large % of packages never arrive. Domestically, (is that a word?) you can get confirmation on 1st class and thats all that really matters!
I only ship samples first class. I did packages first class for a while and it ended up costing me a LOT of money, time and headache in lost packages. I think they've changed the system since then so they're somewhat more accountable, but I wouldn't take the risk if your product is at all valuable.