I was just working on choosing a niche part, and i would like to ask some questions about it : 1- ) Which is better, choosing car niche or Ferrari car niche ? Car niche has more product than Ferrari car niche? Can it be an advantage or disadvantage? 2- ) Cheap or expensive products? Is it easier to sell 50 $ products or 100 $ products or doesn`t even matter ? 3- ) How to get traffic to bans ?
1) Car niches won't get you very high commissions. eBay Motors have a set listing fee. 2) Doesn't matter - whatever is selling is what will bring you traffic/commissions. 3) A lot of people aren't actually selling what they're promoting. They get traffic by promoting fishing gear, but actually end up getting a commission on diapers. Use your niche to get TRAFFIC - if you drop enough cookies, you'll get commissions on all sorts of silly things.
I look on BANS sites as a gateway to eBay. What you'll be doing is opening doors to eBay and handing the visitor a cookie as they walk through. My strategy is to place thousands upon thousands of "doors" in the SE indexes with optimized sites, using both the BANS platform and WordPress. My experience is that many will purchase within the niche they entered, but there are lots of unrelated purchases. IMO, the more pages and product listings you can get seen the better as long as you maintain reasonable quality with your sites.
I wouldn't target big ticket items, they usually have fixed listing fees and won't get you very high commissions. Last week someone bought a $29,000 excavator through one of my sites, the commission was only $145
Not trying to be judgemental, as I have not seen any of your sites... but that sounds like search spam to me... i think a better strategy is 10-20 sites that deliver real value.