This Etsy shop (empireroom) has wonderful vintage lace for sale by the yard! The prices are very low and even better for bulk lace (over 20 yards). The seller, Jayne, has been quite helpful in providing me with information about bulk pricing and quantities. The only down side is that she is in Australia, so shipping is slightly expensive. But you should check out her selection anyway!
I have found other lace sources that have lower prices, but not for vintage lace! Usually the low prices are only for modern made lace, which means that a distinct measure of discernment is needed to choose lace that is the right scale, color, and pliability for the project.
Most of the lace listed on this site would work very well for a reproduction 19th century garment, I think. I can especially envision an Edwardian skirt or blouse embellished with some of this lace as edging or insertion, but I can also envision the lace being used to trim undergarments such as petticoats or chemises.