1803 Reales Coin!!

Well, Its a Mexican I presume or Spanish?
Wat are the wordings? Does it say CARLOUS?
At AG its worth atleast 3 Dollars.

Sorry I've been a while responding; had trouble with my dialup account at home. I'm at work now, without my coin books, so I'll try to remember what I was going to say.

Your description is a bit too ambiguous for us to tell which coin it is, and therefore how much it's worth. Spain and the Spanish colonies in america all issued coins denominated in fractions and multiples of the real, from the tiny 1/8th real to the silver-dollar-sized 8 reales. None of the illustrations in the Krause catalogue match your description of a coin in 1803; as far as I can recall, the silver coins all had either a portrait on one side and the Coat of Arms of Spain on the other (a shield with lions-and-castles, between two pillars), while the coppers had a monogram (fancy lettering) on one side and lions-and-castles on the other.

To ID your coin, we'll need to know:
- what metal it's made of.
- how large it is - either a diameter in inches or mm or a comparative size eg. quarter-sized.
- what the mintmarks are; note that some mintmarks on Spanish coins can be obscure and hard to read. For instance, the Lima (Peru) mint used the letters LIMAE all mashed together to make a single-letter monogram.

You should also be aware that Spanish silver dollars ("pieces of eight") are one of the most frequently forged coins to be found; there's been a flood of fakes on ebay lately, with quite a few coming out of China. Beware of anyone selling cheap Spanish dollars - if it sounds too good to be true, it probably is. If you post a pic, we have some experts in fake coins on the forum who could settle this issue for you.