USE POLY-MAILERS TO LOWER SHIPPING COSTS

When I was selling a ton of throw-away items on eBay about 7 years ago, I considered doing that full-time.  I needed two things: one, a steady stream of products to sell, and two, lower my costs on shipping.  The shipping was killing me.  On that latter score, Bill Myers provides some excellent direction.  He writes

The way to get shipping costs down is to try to sell only items that can be sent in poly mailers and buy first-class parcel rate postage online (I buy via PayPal https://www.paypal.com/us/webapps/mpp/shipping-center).

You can find affordable poly mailers online from many sites including https://www.uline.com/Product/Detail/S-3354/Poly-Mailers/Tear-Proof-Polyethylene-Mailers-10-x-13.

For DVDs, CDs, tapes, books and newspapers, buy 'media mail'. For everything less than 16 ounces, ship first class. 

Here are the Postal Rates on varying pieces.  
Schedule a pick-up from the Post Office.

WHAT TO SELL ON AMAZON? 
Here are the TOP-SELLERS. 
TOP-SELLERS in PET SUPPLIES.  This was a successful product.  Her sales exceeded $10,000/month.  Go figure.  Finding products where you can earn $10,000/month.  
Bill Myers winding down.  
Experiment selling on Amazon.  
Deals & News. 
Thrift Store Flipping for Fun & Profit.  

AFFILIATE MARKETING
Adian Booth.  Ugh.
4 Ways to Earn $1,000/month.  Right.  

CLICKBANK
Support.  Getting started with your new account.  
Marketplace. 

Tom Woods' Happy Earner.