Much too high: Serenissima (I like Venice but this is one of the only UA's that is also a drawback, regardless of whether it is possible to look at this without considering the Merchant of Venice)
Too high: Hellenic League, Mare Clausum, Phoenician Heritage
Too low: Sun Never Sets, Carnival, Dutch East India Company
Much too low: Diplomatic Marriage (lolwut, this is still godlike, huge city + units for 500 gold?)