Found a place for cheap pcb manufacturing

OSHPARK has become even more affordable. I ordered 1.25 inch x 1.25 inch double sided PCB for $7.80 for 3 pieces (We need to order in triplets) making each PCB for $2.60. The price was including shipping. Its awesome price. I am still at prototyping stage so this price is quite good. I ordered on 2nd July , expected delivery is by this weekend. I'll keep you'll posted as to how much time it took. And this was my first time ordering PCB with them.
I do want to know if I can lower price of each PCB to under a dollar as I may need about 50 of them. Any ideas?