[MajinDragon]

Basics:
Diamonds valued at 500platinum coins
Sapphires valued at 100platinum coins
Rubies valued at 50platinum coins
Event Coins valued at 30 - 35 Diamonds currently (you should definately include minimum and maximum values on higher level items aswell as some of the low value items that vary in value.
Enchant Armour valued at 15diamonds
Improve weapon Damage valued at 15diamonds
All other weapon improvement scrolls valued at 5 diamonds
Ring of Strife valued at 150 diamonds, optimum value of 200.
Platemail of Power valued at 50 diamonds (clean)
*It's important to note currently, the item values of low value +12 gear has not shifted due to the increase in EA price, so i'll only include clean item values and not +12.
High shield of deflection valued at 40 diamonds (clean)
Cloak of minor protection valued at approximately 30 diamonds (clean)
Lucky boots valued at 1 diamonds (clean)
Glok belt valued at 5 diamonds
Gloves of marksmanship valued at 40 diamonds (clean)
Green Cloak valued at 120 diamonds
Bunny mask valued at 150 diamonds
Full helmet of might (dex) valued at 70 diamonds (clean)
Rabbit tooth charm valued at 1 diamond
Talisman valued at 3 diamonds
Pink wizard hat valued at 20diamonds
Arcane shield valued at 120 diamonds
Amulet of Mistletoe valued at 200 diamonds
Moon shield valued at 250 diamonds

This pretty much covers most of the basic, low value gear. I'll take a stab at low-middle value gear starting with event coin shop items:

Black Guard Helmet valued at 700 diamonds (clean)
Gold Key valued at 30 - 35 diamonds
Belzebub's Shield valued at 600 diamonds (clean)
Ice Dagger valued at 150 diamonds
Flame Ice Dagger valued at 300 diamonds
Gloves of Dragonhide valued at 550 diamonds (clean)
Amulet of Speed valued at 420 diamonds
Scroll of Houserenovation valued at 35 diamonds
Scroll of housecellar valued at 105 diamonds
Scroll of housefloor valued at 105 diamonds

Ice shield valued at 300 diamonds (clean)

Thats all i can be bothered with at the moment.