Most organizations use CH2V for their "forward facing web site" and MemberHub for eCommerce.   Connecting to MemberHub for eCommerce from your CH2V site is easy...

1) Establish your MemberHub site.

First, you need to establish a MemberHub Site.   
Go to  Instructions are on the page. 

If you do not see your CH2V site listed after establishing a log-in, contact MemberHub Support.  Make sure you tell them you represent a CH2V Site.  They will help you establish your eCommerce site at MemberHub. 

2) Set Up Your eStore at MemberHub.

You will create (or re-create) your store over at MemberHub.  It's actually quite easy, as they have colors, sizes etc. for Spirit Wear and a simple interface to add multip[le items.  You can also use their GiveBack program, or any other eCommerce Module.

3) Connect Your CH2V Site to MemberHub.

Just create a "Store" link anywhere on your CH2V site, and link to your eStore over at MemberHub.   The following organization edited their "Store" tab to hold a picture linking to their MemberHub eStore.

One of the greats thing about linking to MemberHub for eCommerce is purchasers and donors do not need to establish an account at MemberHub.  They can just select the products or services you list and check out - great for anyone who just wants to support your organization without having to register as a member of a web site.