I feel like I have wasted a few bucks myself. Not on a PT, but on other stuff; especially juices. I have bought/tried juices that I never really cared for, even from the first vape. maybe it sounded good on a review, or was well described on a web page. Now, I have bottles of juices that just "never made it" into my rotation. Waste?
Classifieds ... sell or barter/trade them for something else you want to try. No waste unless you choose.
Jan