It would be a good idea when asking for someone to give an example of their colouring to supply an image at full resolution. The file you've linked to is very low resolution and I assume that any colourist that decides to work with you will be working at the same size and resolution as you do in order to get the best results.
It would also be a good idea to supply more than one example of your work as a single strip does not give a good enough idea to most people whether or not the project is for them. You should also let people know whether or not that is going to be the average size and amount of detail of a strip or if some pages might be bigger or more detailed, as well as giving details of how many pages a week you want to update.
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