Soooooooooooo you want to buy a bead for a quest that's easy to get and your paying 5gp for it?
So,you expect someone to go out of their way and completely stop what their doing to get a bead for u for 5 gp...
Yeah,no.Nobody will do that.Also a black bead doesn't cost 1 gp normally.Your new to the server so how would you know the prices exactly?
If you want to buy a black bead you've got to put up a substantial amount so not only you but the seller is happy.I'd recommend 5k minimum.
Of course your new so you may not have the amount of money yet,if not go do some fishing in cath,specifically lobster fishing.You'll be done in a matter of minutes.