Earlier quoted context omitted.
Among the items I ordered today: HC-06: Dealextreme $5.50, Banggood $5.99, Gearbest $6.57, Aliexpress $2.58 Arduino Nano v3.0: Dealextreme $3.46, Banggood $2.77, Gearbest $4.27, Aliexpress $1.66
HC-06 is US$3.46 on Ebay. Arduino Nano v3 is US$3.29 Ebay has a pretty good return/refund policy. And then you can fall-back on Paypal too.
Anecdotal evidence, but I have had far more success with AliExpress' dispute/buyer protection system than eBay's.
eBay is laughably bad at disputes. I have received several items from eBay which were DOA, and my options were to take a very reduced refund, or ship the item back to the seller at my expense.
Same issue with AliExpress, upload evidence (pictures/video) of the DOA item, full refund no further questions.
PayPal is another nightmare in of itself.