Hi.
What do you like best when you're browsing to buy?
I prefer mine at the bottom.
1. Mainly, I want the potential buyer to look at the item they came to see without being distracted. I don't want them overwhelmed with multiple items. After they've gone to the bottom of the listing, hopefully they'll like what they've seen and click through for more.
2. I think it helps the page appear to load faster, giving the viewer something to look at quicker.
When shopping, I prefer it at the bottom also.