No service interaction is impossible...

November 10, 2004 by Chris Charlton
No interaction with online services is near impossible...since you need (1.) a gateway service (~$20/mo.), (2.) an SSL certificate (~$160/yr.+), (3.) a merchant account (~$22/mo + per transaction fee), (4.) a shopping cart engine, (5.) integration with UPS/FedEx/USPS shipping calculator (free web services). *prices are estimates from my experience, U.S.A.*
You might see value in utilizing systems that are "eShop-in-a-box". I use 1ShoppingCart.com for some clients (works with ASP) and Paypal for those who don't with to take on monthly fees like I stated above.