Commission for a beverage commercial agent?

Hey, today I had an interview with a non alcoholic drink brand who'd like to use me as a commercial agent. I would represent them and sell them to either wholesalers and retailers. Its paid on commission only and either way they're offering a 5% commission. It seems pretty low to me... What do you think? What percentage would you recommend me to negotiate? Also, they're dealing pretty small quantities and their sales in the US is only like 150K! Any help, tips and industry insight will be very much appreciated! Thank you