The 77 is really my favorite Air-Way! I like the turquoise 88s too, but there's just something really cool and retro about the 77. And its colors always make me think that it's a "Christmassy" vacuum cleaner!
I have one, all original, with a bunch of extra options. I am pretty sure I have posted pix of it here. I did put it on eBay once but it didn't do too well, and I really wasn't too sorry. I did kinda want to keep it after all!