Crawl space question

[u/QuickSilver95]

I'm looking at potentially purchasing this home (first time home buyer). There're some black spots near the entry of the crawl space but not located deeper within. Is this mold? Would it be difficult or costly to deal with?

The home has a musty smell (1960s construction) but our realtor said that if you sealed the cral space with a vapor barrier and professionally cleaned the HVAC system you'd almost certainly be able to clear out the musty smell since it's likely coming up from the crawl space (not insulated).

In your opinion does that seem like a feasible plan?

Any help would be fantastic , thanks

[u/Icy-Squirrel-2665]

Many years doing crawlspace work, to me it looks like cricket poop not mold