Apparently, I'm not alone! - A couple years back, I scored a collection of assorted Avon decanters on eBay for like $18 or so shipped. Included several chess pieces, a couple of cars, locomotive, rail-road light, a turkey, hunting dog, fire-alarm box (2), and several others. It was a nice mix of Spicy, O'Lander, Deep Woods, and Wild Country, all totally full.
There were also 3-4 woman's perfumes, including a bath oil filled I want to say Cinderella carriage. Resold some of the woman's in better shape off, as my wife wasn't a fan of scents, and recouped some of the cost. Still have one or two, that came stained, making them difficult to sell on eBay.
I re-task the bottles as I empty them with some home-brew stuff. I found a liter of Old-Spice scent oil, which smells really good and like the original Old-Spice, so I mix up some of my own, or doctor the dollar store stuff with a few drops, plus some glycerin for healthier skin.
I'm too much of a minimalist to keep and collect the Avon decanters. I usually just decant the juice into empty hot sauce bottles and take the empty decanters back to the thrift store.