I've been doing a little online
Priority is about 5-6 bucks. cool, I guess. First class is 2 bucks for 5 oz (a t-shirt). Sounds like a no-brainer right? Nah, not so much. There are so many variables that there is no "please all" answer.
When using Priority one of the benefits is time. Priority has a 2-3 day turnaround, that's always a plus. The downside is the price. Call me cheap, but when I buy a $20 the, I am not exactly thrilled about adding 25% just for shipping and then tax. Now if I am buying more than one tee, Priority it is. Another benefit is the packaging. USPS provide mailers for priority shipping. This can be a huge deal when starting your brand.
When choosing First Class shipping, the price is always best. 2 bucks for a tee, sign me up. The downside to First Class is, of course, the turnaround. The USPS says a typical turnaround is 2-7 days. Seven days kind of sucks. I have done some investigation on the shipping times. What I found was: when shipping in state (Texas) there was little to no difference in the arrival time. I sent two packages from Dallas to San Antonio, one Priority and the other First Class, they both got there on the same day. Now this was done in March, so that is not to say that during Christmas your packages are going to arrive on the same day. However, I thought this was a good enough reason to use First Class when shipping my tees.
Another bad thing about First Class is that you must provide your own packaging. As far as I know, the USPS does not offer mailers for First Class like they do for Priority. For more established brands, this may not be a problem. Some brands go above and beyond on packaging and can offer their customers the benefits of the low costs of First Class.
Like I said, to each his own, there is no right or wrong answer for everyone.Whether you are a customer or a brand owner these are a few things to consider when buying/selling tees. Word.