Firstly, and I say this with all the love and respect I can... 90% of girls still wipe back to front so hygene isn't top of the list for most. Same with going from anal back to vaginal. Eugh. Girls are often more sniffy at wearing previously worn outfits, than they are about warm toys!
No one would buy content featuring the talents own toys. Most have just one dildo, usually a Rampant Rabbit, usually tiny and always grossly stained and dirty. We don't give the girls the toys at the end of the shoot because, shock horror, they are working tomorrow and tomorrow's shooter would then have a choice of TWO toys from her bag, one of them worth 60bucks and brand new!
We run the toys through the dishwasher then get the girl to handwash and anti bac it right before going on set.
For us, where we mostly fly away to shoot toys already end up half filling a suitcase. I just put a large rubber dildo on the scales and it came out at 900g. Each day we shoot a girl with roughly 4 different dildos and on a good trip we'd do shoots of 10 girls. That's 40 toys. Even with an average weight of about half the 900g you are still looking at 20kgs of dildos. That's virtually the entire baggage allowance on some airlines!
Most girls don't care if they're used or not but the odd few do, in which case there's always some new ones available as there's a constant churn of old ones being thrown away and new ones bought. Even with care they only last a few shoots at most - once the rubber is in the slightest bit sticky or porus they get binned. Same with bite marks. Rubbery toys might last 2-3 shoots, solid ones a bit longer.
HOWEVER, we only buy phthalate free toys now.
http://en.wikipedia.org/wiki/Phthalate
It's still legal to be used in sex toys, though banned already in kids stuff. Looks really nasty and if it is, a working model spending 3 days a week, 6 hours a day with it in her has got to be at the top level of exposure. Not good.