Yeah I had 2 encounters with those basilisks and that was enough. Not only are they creepy looking, I heard so much before playing the game about how bad getting cursed was - just made the encounters that much more intense. First time I found their little area wasn't so bad, because it was during my original exploration of the Depths, at my very slow deliberate pace. Pretty much lured them into 1v1 battles. But second time I was in those narrow channels with flowing water up top, and I missed a jump over a hole - and was deposited in the middle of a swarm of them. Haha I freaked out but managed to survive and avoid the curse.
I stocked up on curse fixing items. As mentioned, Oswald at the bell tower sells them, as does the female merchant in the waterway to Firelink. Note, they are pricey from the merchant, but Oswald sells them at half the price. So may be worth back-tracking. I bought all of Oswald's supply, seems he has a limited quantity.
I'm still working on Blighttown. Only get to play a few hours a week, so it takes awhile. Poison darts were a pain, is that a respawning enemy? I killed one. Basically working my way outwards from the bonfire early in Blighttown. But kind of hung up trying to get to a couple pillage-able corpses that I can see, but haven't been able to get to yet. lol, I hate leaving things behind, don't want to miss any loot.