What would you call someone who enters old places, like ruins and sells the stuff he finds?

What would you call someone who enters old places, like ruins, and sells the stuff he finds? I'm making a game and don't know the name for the profession.

Solution 1:

Not as a profession, but usually pejorative, that would be a scavenger. Dictionary.com has:

a person who searches through and collects items from discarded material.

Solution 2:

Probably a term that is worth citing, giving the amount of ancient ruins present in Italy, is from the Roman dialect: tombarolo. The term is used also in English:

Tombarolo is an Italian term (plural ‘tombaroli’), derived from the Italian word ‘tomba’, meaning tomb or grave.

It refers primarily to ‘tomb-robbers’ operating in Italy (Mackenzie and Green 2009: 3), although the term ‘clandestini’ (meaning ‘illegals’ or ‘clandestines’ in Italian) has also been used to describe clandestine diggers (Renfrew 2000: 17), and a tombarolo might not necessarily limit their activities only to tombs and graves; for example sometimes removing material from villas and other sites (Watson and Todeschini 2006: 151).

(traffickingculture.org)

Tombarolo:

In Italian contexts: a person who steals archaeological artefacts and antiquities from tombs or graves for sale to collectors; a grave robber.

(Lexico.com)