In 2013 I bought a case of 500 3ml disposable pipettes from these folks.
The pic is a bit deceiving, there are actualy almost 2/3 of the original 500 left. At today's cost of $31/500ct, my cost is maybe $3-$4 per year. One of the better model-related purchases I've made.
Just what I did, I'm not saying it's right.
I don't know how the linked supplier's cost compares to others.