Free Shipping -vs- Charging to Ship on eBay (& Whatnot)

Stuff I use in my warehouse:
General:
Heavy Duty Metal Rack w/ Wheels: amzn.to/2Gsq5lu
Standing All Day?: amzn.to/2ImOoBF
Keep Track of Humidity Levels: amzn.to/2Il9G2Q
Shipping:
Cheap Labels for Dymo 4XL: amzn.to/2GtDBt8
Weight Scale: amzn.to/2IoW5HR
Dymo 4XL Label Printer: amzn.to/2GwwD2r
Box Cutter That Doesn't Break: amzn.to/2Il9ZL2
Photography:
White Backdrop: amzn.to/2Iq98bP
Beginner Lighting Kit: amzn.to/2IkyQhZ
Mid-High Range Lighting Kit: amzn.to/2IkAwbd
Portable Photo Studio: amzn.to/2pW5XSv
Amazon FBA:
Suffocation Warning Labels: amzn.to/2EetUZC
Dymo LabelWriter 450 Turbo: amzn.to/2GsVjwX
Cheap Labels for Dymo 450 Turbo: amzn.to/2H4vv7h
Inventory Lab: bit.ly/2p6tj7C
Wireless Barcode Scanner: amzn.to/2Iq2Pov
Testing Station:
Surge Protector w/ USB Slots : amzn.to/2GtJAdh
Shoe Cleaner: amzn.to/2Eeu1V2
Best Skinny Tape: amzn.to/2GrxiWM
Alcohol Prep Pads: amzn.to/2pY7BD4
Adhesive Remover: amzn.to/2uDM3R6
Pokemon Cards:
Card Scanner: amzn.to/2GtWFrj
Ultra Pro Team Bags: amzn.to/2InfcBL
Penny Sleeves: amzn.to/2JdOhd3
Semi-Rigid Card Sleeve: amzn.to/2EeCdER
Productivity:
Best Bluetooth Headphones: amzn.to/2Efbp75