Shane Costello is organizing the charity auction, he's one of the good guys in the retic world.
The Reptile Report has published the above link as the official GoFundMe so I'd imagine it's legit.
I also agree that purchasing a critter from the business would provide a lot of help right now as well. I remember after my mom passed things were crazy for a few weeks, and I couldn't imagine trying to care for a ton of animals and keep a business functioning at the same time.