the seller may not but the manufacturer has one. any issues and Corsair will handle the swap for you.
seller can't take that away from you

but it is good to be wary of such things. i can't read it but i assume it is a new unit so it should be ok. but there are other listings for the same psu at slightly higher prices. 125-135 km roughly
there were a couple others but there were a few more eruos. this one is only a few more than you asked for but it is a solid unit.
https://www.olx.ba/artikal/25591601/xfx-500w-xt-80-plusbronze-novo/ 125 km
this one is even better for a bit more.
https://www.olx.ba/artikal/26389936/seasonic-s12-ii-520w/ 140 km
i can't read the language so you'll have to look for warranties and such.