Price and inventory. I have a tendency to buy used when I can for $$ savings. They have a rotating stock, and often their prices are as good as eBay... and Roberts has a warranty which from private party on eBay you will not receive... and they stand behind that warranty. No brainer. You do have to visit their site to check inventory often as it changes with used gear.

I found a camera that I've been looking for. The description was thorough, photos were accurate, and the price was great.

Endorsement by Kevin Raber - PhotoPXL and formerly of Luminous Landscape