Shouldn't it be "meget dyrt" not "for dyrt"? Meget is used as much, very, and too. For is used as for, to, at.
Why isn't "It is too dear" not accepted here? It means the same and is shorter to write. It's also easier to remember that dyrt->dear.
"it is too expensive" is "det er for dyrt" where det is in general "This is too expensive" would be "det (her) er for dyr" where dette is one particular thing. - i think
I'm not sure I understand why 'dyrt' functions as an adverb rather than an adjective. Is it because of the "for"?
Why hasn't this answer been corrected to accept 'too dear'? It is a common English English way of saying this and is accepted elsewhere in Duo.