TBH, I am struggling to get the idea of "find the cheapest price" competition. It looks like the goal is to find best price and product quality simply doesn't matters. Me think it wrong...
When I am going to buy some product (say, wireless router), I am doing the following research:
1. Identify price point.
2. Idenity my needs.
3. Conduct a list of what is available on the market as there is no point to read reviews for some model which is only sold in Oz.
4. Visiting specialized forums (paying no attention to any reviews in printed magazines of course), going into techie details (for example, NAT table size for routers).
5. Creating short list of products that'll for sure suit my needs, taking in account warranty and support terms. Usually having no more than 3 products in it.
6. Looking for best price.
I understand that this process might not be suit everyone :) But as you can see, my point is to find best deal on best product and not the cheapest on the market.
My proposal is to identify one or two products in its class and then run price comparison competition on these products only.