If the gallery exists you should be able to get a phone number off the internet. Call the number and double check. I know it's scary, I had a store contact me to carry my work and I was worried that I was sending hundereds of dollars worth of product to a scam artist. It wasn't a scam and I still sell with them (the store is five hours away so I wasn't able to visit). Do let an opportunity pass you by, just make sure you do your homework and make sure you get a contract.