1789 8 reals, again

For the last year I've been trying to find out what this Mexican 8 reals coin is worth. I am sorry, I do know this is a US coin forum. I'll have you know from my research on it months ago I learned that the colonists used these coins. In fact the US accepted these coins as US tender until 1858. found an archived auction from 2005. http://coins.ha.com/common/view_item.php?Sale_No=378&Lot_No=12781#Photo
There is differences between my coin and this coin and I know the place it was minted makes a huge difference in value: my coin is minted FM(Mexico) and not DA(Chile I believe), my coin is EF with no "graffiti", "bumps" or any other problem PLUS it has a very noticeable die brake on the reverse. I emailed a Spanish coin web site specializing in the sales of Reals, they said they buy them "all the time" for about a hundred bucks. No thank you! I have never EVER found them on eBay or anywhere else even in P1 shape. My question remains, what is it worth? Seems the pics are too big to post:
There is differences between my coin and this coin and I know the place it was minted makes a huge difference in value: my coin is minted FM(Mexico) and not DA(Chile I believe), my coin is EF with no "graffiti", "bumps" or any other problem PLUS it has a very noticeable die brake on the reverse. I emailed a Spanish coin web site specializing in the sales of Reals, they said they buy them "all the time" for about a hundred bucks. No thank you! I have never EVER found them on eBay or anywhere else even in P1 shape. My question remains, what is it worth? Seems the pics are too big to post:


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http://coins.ha.com/common/view_item.php?Sale_No=9441&Lot_No=67468#
Charles IV 8 Reales 1789 Mo-FM, portrait of Charles III KM107, XF
Sold for: $86.25 (includes BP) Bid Source: Internet
Ended: Oct 1, 2007
<< <i>I emailed a Spanish coin web site specializing in the sales of Reals, they said they buy them "all the time" for about a hundred bucks. No thank you! I have never EVER found them on eBay or anywhere else even in P1 shape. My question remains, what is it worth? >>
Not having a catalog handy and assuming this is a commom date, I'd think $100 is probably in the upper range of what a dealer would offer for the coin.
And this is a "portrait dollar":
In honor of the memory of Cpl. Michael E. Thompson
I knew it would happen.
It's a transitional type with the bust of Carlos III, but legend of Carlos IV. New World Treasures New World Treasures has this in AU for $495 (which is a bit optimistic, in my experience). Yours seems to be XF reverse, high VF bust (probably XF overall, though). Are those hairlines on the bust? If so, it may indicate old cleaning and would drive the price down. If it's problem-free XF - price would be around $250, if hairlined - $150 or so.
8 Reales Madness Collection