As PD says, it does look galvanised to me, however, it also looks like very cheap and flimsy, just by the pics.....! IMHO...!
For the same sort of money, you can buy a brand new, bomb proof, reputable one...! Just my 2p worth.
Give Ben, aka 'trailer guy' a pm, and see what he can do for you. Also have a look at ' extreme trailers' website, they are in southampton.