I run 2 of my directories on my server and they are quite old and get decent enough traffic one has alexa rank of 48K something and other one 51K something , alexa not too good of a measure of traffic but gives some idea.
Here is what i end up using :
Disk Usage 389.61/35000 MB
Bandwidth 3.9 GB
As per unique traffic its 9534 unique visitors every month.
So you should be able to get decent hosting for your site for less than $2 for sure . Script i ended up using was phpld.