I also have used different types of basting spray and now use only 505. It's not carried locally where I am, so I order online. JoAnn's online sometimes has it on sale for a good price. I usually don't catch sales, so I order 2 cans at a time from this place
http://www.sewforless.com/item/505_T...OUND_ONLY/7391
These are the large cans, so they last me awhile. I don't buy more at one time because I'm sure they have a shelf life, and I don't want to be spraying with something whose chemical composition has changed inside the can.
Note: Even though 505 doesn't have the strong smell of many other brands, it is still very important to use it in an area with good ventilation. Also, be careful if you have birds; I know that some types of spray such as Febreze are very bad for them, and I do wonder about basting sprays too.