screen printing prices are usually calculated by the number of colors to be printed, the number of print locations, the color/style of the garment (if the printer is supplying the garments) and the quantity you want to print.
So changing any of those variables can change the price you pay to get shirts screen printed.
It's hard to say what's reasonable without knowing all of those factors.
A good way to find out if it is a good price is to call around to other local screen printers or to request bids on a place like http://boards.screenprinters.net (classifieds) or even the classifieds here.
You may find that running smaller quantities might be worth it even if you have to pay a screen fee or a film fee. That way you don't have more shirts than you need.
So changing any of those variables can change the price you pay to get shirts screen printed.
It's hard to say what's reasonable without knowing all of those factors.
A good way to find out if it is a good price is to call around to other local screen printers or to request bids on a place like http://boards.screenprinters.net (classifieds) or even the classifieds here.
You may find that running smaller quantities might be worth it even if you have to pay a screen fee or a film fee. That way you don't have more shirts than you need.