Which tool did you use?
When I searched Ahrefs & Moz I get the below stats....nowhere near 300k backlinks
Ahref's
Domain Rating1.9
Backlinks 2,365
Referring Domains 230
Moz
Domain Authority 13
Linking Domains 581
Inbound Links 7.9k
The domain by itself is worthless, also looking at the backlink quality the majority don't look that great - can't see it generating a lot of traffic
Also why would you buy a domain when you don't know what your going to do with it? Seems odd.....