All depends on the condition! I have a handful of large motto 1864's in worn shape that I've gotten in estate and antique shop lots and I'd take a few bucks for each. Small Motto is worth a lot more, Redbook lists it in G4 for $120.
In a Good-4 or VG-8 which is the normal condition of these coins, the Large Motto is worth about 16-20 dollars while the rare one, the Small Motto is 120-150 dollars in those conditions.
My suggestion is to look at heritage and see what auctions are bringing. You can also get large pictures. You could probably also search for clembo and 2 cent to find other pictures or threads.
Been a while since I posted here. Been even longer since I updated my 2 cent pictures. But a few of them may be found in the link provided. Prices for G4 1864 2 Cents will vary from $5 to $15 depending on the state of the coin i.e cleaned, damaged etc. G4 Small mottos may be found for around $100 if you are patient and don't mind a few defects.. http://www.mycoins.us/USA/2Cent/2Cent.htm