So six devices and six toppers. Six different flavors? I thought I was extreme with 3 devices\flavors in rotation. And what exactly is your ROI? Generally ROI means a monetary return on investments.
I'll leave my kids a note to contact you after I pass.
That's when they'll go on sale.
But, from all of my observations of eBay they'll fetch at least 50% of new cost.
Perhaps more for the 2 Ti Provi, and Beta P3... Perhaps not?!?
Certainly more than a disposable Chinese Mod.
Jim
PS Currently have 14 tanks in front of me... A bit of a Mad Vaper, I guess.