Hello All,
 Let me start by saying I am very much a newbie to the ecommerce/web development thing and looking for a little help. I am launching a website that will sell discounted vacations, and various other coupons/offers (4 offers in total) and need to add a shopping cart. My question is as follows: which of the three options listed with LP is easy to use, inexpensive (free  ) and is customizable. I am selling my offers to my distributors and affiliates and need flexibility in the cart/order form to reflect this. Any advise is appreciated. To make it easier to understand my babble my site is www.valuenmore.com

Regards,
Dominic

Might check out this post here, goes over some of the basics of what you might need for an ecommerce web site:

http://wiki.lunarpages.com/Basics_of_eCommerce