actually the range is more like $0.25- $7,000.00 but here's the deal. the most expensive ones are graded by a grading company, and graded highly like MS69 with very few peers in that grade.
the coin pictured would be worth $0.25, a below average circulated coin.
as far as values of coins, I'd suggest buying a copy of "A Guide Book of United States coins
2021" more commonly called "the Red Book
" in the hobby. it has info and pictures and rough values and describes grading of coins, which is how a value is determined. it's a good starting position for someone that likes looking at change and finding things. the spriral bound paperback can be gotten for between $8 and $15, the hard cover for a bit more.
And it doesn't change much from year to year so older copies can be gotten for cheaper.
I get it though, an 11 year old. and a 1999 quarter is 22 years old and 11 years older than your kid. I'm sure the "aged" appearance caught her eye and made her want to know more.
As far as looking it all up on the internet, it's a bit more complicated for a child and not clear on what is the low end, and what is the high end for what is easy to understand and immediatly available on a search.
first this is the population reports of whats been graded of that coin with NGC
From this you can see, only one coin of this date, state, and mintmark has been graded MS69 by NGC
. this would be "top population" or the highest graded examples.
Next you would look up auction prices on either grading companies website, try to see what it recently sold for at auction, if it sold:https://www.PCGS.com/auctionprices/...922536201498https://coins.ha.com/itm/a/1251-9530.s
this information will tell you the NGC
graded MS69 sold in a Heritage Auction
for $7,050 in january of 2017. condition is king for collectors, that's the takeaway from it.
A copy of "the Red Book
" will give her enough general information to connect the dots on what to learn if the interest is there as a hobby, but not too heavy for a child to understand and become overwhelmed. it's a good starter. I think most of us started like this. even that book, at least for me when I was a kid, kind of went over my head at first, but when I picked it up as I grew older, it all started to click on grading and determining grades, and estimating values.
meanwhile it's a good piece of reference material for beginners that has average prices so a kid can look up their pocket change and dream.
Here would be a link to the PCGS
price guide, again, it's averages though, but you'll notice there's a drop off in value at MS67, and coins that have wear aren't even graded because low mint state coins are worth like $3-$4 and not even worth the cost of the grading fees. https://www.PCGS.com/prices/detail/...des-61-70/ms
this is a reference on the internet for an average, but again, knowing how to grade, and Mint State coins from circulated coins with wear is pretty much everything.
Good luck and be blessed!