I have a guy in another group that I'm a member of trying to tell me "there is a 1955 D cent that is doubled die that is more rare than the 1955 p doubled die." is this the truth? or is he full of it?
That's not true. I think he is full of it. You can search it up, "1955 D double die penny". All that pops up is stuff about the 1955 Philadelphia penny.
There is an error for the 1955 d where there is a D stamped over a horizontal D but it's only worth about $150.
And one of them MIGHT be rarer than the #1 55 DDO, (I don't know, not my field) but they aren't more expensive. As stldanceartist pointed out rare doesn't mean expensive.