Tengis is your pricing on the website the same as on ebay?
Often I'll lookup a normal webstore from clues like what you're saying, but I find the price to be the same (or worse) than the ebay or amazon store, or charges shipping etc. I'm all for buying direct but I'm astonished at how often...
Depends on the weight. If it's relatively lightweight, pirateships "simple export rate" can't be beat, although you need to chat to have it activated on your account. https://www.pirateship.com/simple-export-rate
https://ship.pirateship.com/register
First class mail / "ground advantage" under 1lb can be under $5. I just checked the rate on a 6oz package going within a zone and the cost is $3.99. Depends on what you ship, but under $5 these days is not too common.
This is a YMMV situation, I've never had a PO refuse a small flat rate box inside (8.55) a flat rate envelope (8.05). I have seen other reports on the internet about this too and it's argued back and forth, so I will just say it's a personal results thing. There also used to be a longer non-flat...
A - Agree, specifically if there are specific areas that could be an issue, but generally if you're not selling collectibles you don't need a TON of pictures
B - Probably a good idea but I've never done the pictures. Receipt is simple enough though.
C - I very rarely insure packages, but I pack...
I think it depends on the product. Even if it needs a box if it's <1lb it will not be $7. I ship plenty of padded mailer type stuff for $3-4, but as you approach 1lb its usually around $6. I would think anything under 8oz or so should be <$5