It is $9.95/quart most places on the web + shipping. Ten dollars per quart/liter in my hard ceiling, won't pay more than that. I did pick a case off of ebay for $8 per, I'm keeping my eyes open for more at that price.
Probably later in the summer, maybe fall, I want to try this in one of my 450s to see how well it holds up with the trans gears chewing on it, but for now I have plenty of 450 oil in the stash.