Tried the new eBay first class shipping envelope-results
Obviously this is a small sample. After reading on the forum about other sellers having success with this, I thought I would try it. I had some low priced coins I could list.
I shipped 19 raw coin orders using the cheaper First Class Envelope Rate with no real tracking, between OCT 2 and OCT 11. (eBay says they have their own tracking system). I bought the recommended eBay 8x6 cardboard envelopes.
As of today-10/17:
11 show as delivered
8 show as not delivered.
3 of the 8 have feedback so I know the buyer got them. I have no idea about the other 5 at this point, except 1 buyer says he did not get his coins. He will wait a few more days, then make a claim. After 30 days I can make a claim with eBay to get my money back after I give the buyer a refund.
Also one shows no tracking from the post office, and no acceptance. As a top-rated seller this will hurt my 100% on time next day shipping rating. Now I will have to go through the hassle of calling eBay and disputing their tracking system, and ask them to remove these 2 hits to my record.
I seriously doubt I will ever use this process again, there is way too much hassle/risk with their "phantom tracking" system.