A very simple way to start is to use a blog format (I use wordpress) on which you can put pictures if you want. I'm sure my site doesn't look as professional as some of those you'll see from other forum members, but it's free and it does what I want it to, namely, it lets me direct people who want to see my geckos/ceramics/caresheet.
Are you seeking web designing company?
Nowadays there are lot of service providers who offer cheapest and professional web design service.
I would suggest you to visit XnYnZ.com Here they have two types of plans.All plans includes special kind of features with lot of free services.Through this service,You can Promote your business with a professionally designed Facebook page, including monthly updates (optional).
Are you looking for web designing company or only professional whose develop your website? If you are looking any web designing company then I would like to suggest AriesTCO.com . for web designing. It's provide a quality services within short time.
I recommend that if you have someone design a website for you make sure you request that they set it up in such a way that you can edit it yourself whenever you want. You don't want to have to need the designer (or pay) whenever you want to update your site, and that gives you the option of updating the "available" sections whenever you have new animals for sale and to take down the ones you've already sold.
It's not any more expensive or difficult to have a website with the option to edit yourself and it makes your life significantly easier.