Jace, I love your avatar...
Is this pic in the forum's gallery, by any chance <G>?
As to Melissa...
Melissa Officinalis... would be "related" to the 4th Chakra, good when you are down, in times of grief/grieving, depression/nervous breakdown, insomnia, anxiety, etc., but also improves digestion... used as an antispasmodic, and known to be anti-inflammatory... that's all I can tell...
I assume that its cost is in connection with the quantity of herb needed to produce the essential oil.
And if you think it is expensive... well... find out how much Linalol Thyme or Geranium rosat do cost... and if you really wanna have a blast, look at the price for real, pure Rose oil... ;-)))
Big HUGS to Julie and Everyone...
Jampa
P.S.: About Melissa: I checked on the internet, to make sure memory is not failing me... it ain't!! but I found one contraindication: people who suffer from (translation....?) glaucoma should not use this oil. Now I could not find if it is also true about other diseases of the eye...