apparently the beauty of toned coins, whether they be natural or unnatural, is in the eye of the beholder.
for me, a (mostly) symmetrical & colorful tone on a decent old coin is what works. the things that
ebay seller is displaying aren't very attractive to me, i'd never buy any coin with a toning like what he's attempting to sell.
first of all, I despise those
Sacagawea dollar coins, toned or not i'd never pay more than a dollar for one. it's just not an attractive coin to me, so my opinion is biased right out the gate.
second, the toning on those dollar coins looks more like rust, like keith12 said, or an odd bit of corrosion. I'm not saying it's corroded, it just looks like it, and that look isn't attractive (to me). it looks like it was involved in an accident of some sort that led to it's current look. I don't know anyone who collects coins that 'appear to be damaged'. toning is technically 'damage', but some tone-damaged coins have a really attractive look to them (and some don't), but again it's in the eye of the beholder.
i have just a couple toners. I also have a few coins that are unattractively spotted with toning, but I've never gone out of my way to purchase anything like what that seller is offering and probably never will.
Florida Toned... lol.... when I read those words my mind interprets them as a warning...