How many games on PS2 are on dvd?

[bigmac_4000]

I was looking into buying a Ps2 and doing my homework on how hard it is to at Mod-chip and burning cd's. Reletively easy except.....How many games are on DVD. I was looking at the pioneer DVD burner for 600$ then 60$ for 5 disks. Thats a little expensive. Aspecially when it's converted into canadian dollars.....
Is this something I should be worrying about.
Thank You