Pricing foals.
Always an interesting discussion.
I’ve been breeding and selling foals for almost 10 years and this is my method:
First I dismiss any notion that the price of the foal will be in anyway related to what I’ve invested in conceiving it. (Breeders: Long term if the price you can get for your foals is bellow what you need to “produce” them then you have to revise the concept that you have a business and revert to hobby designation).
I start at the high end: what are the top price for foals in NA? I think that the $15,000 to $18,000 is probably about right. (Notice I did not say they were top foals, I simply say what is the high end of the scale).If you think the price can be higher than adjust accordingly.
Then I start subtracting:
Is the foal from a top mare line with traceable offsprings in performance (chances are she is from Europe as we are terrible in NA at tracking offsprings)? No: take $4000 off if it’s a filly, $2000 off if it’s a colt unless it is considered a stallion prospect 
Is the Dam inspected with one of the top Stud book and score in the top 10% to 20% (Premium designation or whatever that stud book calls it,)? No: take another $2000 off.
Does the dam have any other credentials other than her inspection scores? No? Take another $1000 off.
Will the foal get full registration papers from the registry? No: Take another $2000 off-particularly relevant if this is a filly.
Is the sire approved based on scores and has a performance record? No: take another $500 off.
Does the sire have traceable performing offsprings. No take another $1000 off unless it’s a young stallion just starting out then take $500 off.
We are now in the $6000 to $8000 range.
Now: is the foal correct/healthy in all aspect. No? Take another $1000-$2000 off based on what is not quite right.
Is he/she flashy, attractive? Is she exceptional compare to her siblings (1/2 or full)- and you can demonstrate this by comparison (photo, video, performance etc…). Add $1000 to $2000.
If your registry inspects foals and gives scores and it scored in the top 15% in the nation: Add $500.
Does he or she appear to be destined to be an amateur mount or only for fully insured professionals (give the future buyers some room to pay for some help down the road ) Take another $1000 off.
How badly do you want to sell the foal?
So to the OP, you can see that wanting a filly (which most breeders will secretly covet…) with full papers, from proven sire and dam line and from good lines that also has the potential for the upper level career basically puts you in the highest price bracket. Look at what you are willing to negotiate and you will see the price drop in reaction to your choices.
Good luck.