No, the price of the Canon focus screens are extremely cheap from the Canon Parts Center. T1i focus screens are $1.98/ea and Canon 40D/50D focus screens are $2.00/ea. Shipping is $6 UPS regardless of order size.
In the past, they used to package the focus screens in individual plastic bags wrapped between soft dustless sheets. However, recently, they started to package the focus screens in small plastic "boxes" which houses 5 focus screen. It saves them money since they focus screens are no longer wrapped individually, however, I found that there are "more" dust on them!
I recently got a pack of 5 for my T1i; out of the 5, only 1 had no imperfections -- the rest either had small black dots or micro-scratches on them.