No rust just what does it mean

Pentastarnut said
VERY SOLID MOPAR for sale, it just needs quarter patches, trunk and floor pans...
WTF ? HA HA HA
...some people

I've seen, and laughed at, those ads too.....like this:

"68 Dart absolutely zero rust anywhere, except quarter-sized holes in driver's floor and some small bubbling over both rear wheelwells and a dime-sized hole under rear glass"