As for normal eggs, can't say I have ever really thought about it, generally I just moan about the price of everything at home abd abroad Egss don't particularly stand out.
Don't know what your paying in Spain but we have been spoilt in the UK this year, all the Cadburys eggs and Snickers etc which includes the egg and two snickers bars have been 89p in Tesco, so about 89c at the current exchange rate. Bit of a bargain really