I love 505 as well.....and here is a great deal...
http://www.sewforless.com
Do a search for 505 basting spray...a large can is 17 ounces and they are selling it for $13.34. The 8.5 oz can is $9.19. Joann's online sells an 11.7 oz for $24.49! I ordered 2 cans from Sew For Less, and it arrived in a few days. This was last week. I love having 2 large cans!! Oh oh, no excuse not to get some UFOs basted now...lol, those Irish Chain Quilts that I've been making from scraps are now on my list!