I'm interested in your powerbank--I'd be willing to pay $9 for it
You know this power bank is brand-new right? So it's worth $20 and I already lowered the price to $12 so I could sell them quickly.
Of course--there are comparable products on the market, inlcuding from amazon, for a similar price
I made sure to price them below the prices on Amazon. I will go down to $11 final offer.
I'm willing to consider $11, are there other perks to this device I should be aware of?  I know that it has several protections built in--but I want to make sure
Yes the battery actually last a long time and it has five security protection.