Hiya Equuleus, Congrats on getting the DCS355D oscillating Multi Tool. If you want to stick with the Dewalt Quick change you can run Rockwell blades or Dewalt Blades. Rockwell blades are cheaper and I would say from my past experience are in the same quality as the dewalt blades. Since price is an issue for you, order your blades online from Zoro.com. search < DWA4203, DWA4206, and DWA4208 > or Dewalt Oscillating Blades. If you want to run Rockwell blades, it is about the same price to shop at Lowe's or Home Depot then the internet . Always cheaper to buy the 3 packs then individual blades also.