Hi there i have the following suggestions about your site;
Firstly i like the look of the site as i enter it the blue and white looks good, though having the title bar for shortcuts above the site name - its unconvential and as a result when i first looked at the site i didn't notice it was there. Just something to bear in mind.
The first title looks a bit cramped when on the first page - i feel that it would look better in a smaller font all the way across one line. I think this is mostly due to the fact i would with a widescreen laptop and as a result the left and right hand side of the screen looks very underused. I am i correct in thinking that this is a weebly template? (Nothing wrong with that just that you can extend these very easily.)
The recent posts is good though the heading gets confused with the actual list items to me Maybe a different colour to mix these things up?
The recent posts side bar also has a mixture of cases when addressing items, so in one instance you will have every word capitialised - Automotive Dash Kits where as others it will be all lower case - bmw part wholesale, and others that are all caps - HOW TO GET CAR DEALER LICENSE.
Also i found the top menu repeated on the bottom of the recent posts - due to it being in the same font and frame it looked like it was part of the recent posts bar.
The use of ads is good, it's clear what are ads and whats not, though this template need to run through all of the pages. some have half ads, like the front page which looks like there should be text running down the right hand side and the rest of the pages you have to scroll past ads to get any real information. If you extend the width of the site you can avoid some of these issues.
The content seems interesting though the mix of video and text makes it seem more like an interactive blg than a product website. When i look at the site i dont see something that i would want to by a product from.
I guess though this largely relates on how you want your revenue generated, is it from the ads that you have on your site or from the ebay products that are on sale there?
Personally i would go one way or the other, using it as an information site with links to other products or a product site that is selling items. I don't know how many sales you will get with that many adverts. Though i could be wrong, you may be making money from this model.
The site looks good and has some interesting content, some minor presentation issue that can easily be sorted out, though a confusing idea about which source of revenue leads me not to want to buy the items listed.
If you would like further feedback i am more than willing to do an information swap, (That goes for anyone reading this post as well!)