Yes.  You can do it.  And since I like the idea of showing how, and someone else though it would be interesting, I'll go through it.

This will take me a few posts to go through, from locating an apropriate website, identifying a product, producing the product, and putting it up for sale.

Points to note:

• This is not hugely cost effective, you'll be giving away ~25-30% of your revenue to someone else in exchange for not doing payment processing
• I don't recommend this for long term use, but it works well for getting some cashflow up front.

You WILL need:

• A PayPal account (if you want to get the money quickly)
• The ability to program, or someone who will do the work in exchange for a profit share.

Things you need to do:

• Locate a website that acts as a "marketplace" and processes the payments for you
• Research the products that sell well
• Create a product specification
• Create the product (or get it created)
• Package it
• Set it up on the website
• Write sales copy for it