Help Needed To ID Ancient Coin

http://www.wildwinds.com/coins/ric/...0045_var.jpg

Quintillus - 270ad, brother of Claudius ii
Ric V-45 variety, Reverse legend.

Concordia standing left holding standard and cornucopiae
T in ex = milan mint.

Nice find

Quintillus is one of the scarcer emperors, and one of my favorites. He was the little brother of Claudius II, and was named emperor when Claudius died unexpectedly in a plague outbreak. No sooner was he ratified by the Senate than Aurelian claimed the purple himself, and Quintillus is said to have killed himself to prevent a civil war.

The Historia Augusta said he ruled for just 17 days, but his coins are too common; he probably ruled for at least 3-4 months.

@ tenbobbit What does 'T in ex = milan mint' mean?

Also, could anyone tell me a reasonable retail price to expect for this coin? Also, tell me a web site that has this type of valuation information along with any premiums for specific varieties etc.

As for price, it is usually difficult to articulate with ancients; there are no price guides and many areas only have a few dozen active collectors; the price depends on how many show up for auction.

Your coin has very strong bust and reverse details, but a weak legend and is pretty heavily patinated. You could normally try to clean that, but I see a pretty big flan crack; soaking it in water or olive oil could cause his face to fall off.

In this condition, I would expect an ebay sale to fetch at least $10, most likely $15-20.