there I changed it for you to understand the meaning better. Coined from lay away. You lay away (reserve) your product of interest until you muster the money to pay. The length of time to wait for payment is determined by the seller and buyer.
In this case with the EXD BP/W it is until my last paycheck comes in (this or next week).
ps - Anytime I need unsolicitated help in tagalog I can count on you, and you can count on me to do the same with your English. hehehe.
You know I think you're awesome...