I'm setting up a new website (already designed), and part will be dedicated to selling products. Looking at abount 10 products with each having 4 or 5 options. Not sure what I should do from here and would be interested to know the best options i.e.:

Go for a hosted ecommerce site?
Have a programmer install an off the shelf product?

This site is hosted by a 3rd party ISP so I have limited options on what can be done with the server installation. Payment processing will be through a merchant processor (don't want to store any financial details). Not looking at lots of $$$ (would be nice but I reckon about 100+ sales per month).

Any help on this and potential pitfalls would be of great help! Very confused as a real novice to this part of development process.

THANKS in advance