Listing strategies for better results on the Comparison Shopping sites

Keyword rich title and description
We should use the maximum Character limitation provided by the Comparison-shopping channel to give as much information as we can. Make sure to blend in the keywords for which you want your products to show up.
Remember.
The entire Title and Description is searchable on most of the Comparison channels

Optimize your listing
Use the options given by the channel to differentiate your product listing from the rest of products by adding things that will attract the attention of the buyer.

Submit feeds regularly. Twice a week is the best thing to do.
Most of us typically send the feeds one in a fortnight or whenever there are major changes to the feed. But most of Comparison-shopping sites, these days give a better ranking to the feeds that are submitted frequently. So it is very important that we send an updated feed to all the channels atleast twice a week.

Uploading the feed every day has doubled the orders that I got from Google base

Provide as much information as you can
Build your feed with the maximum information you can give the Channel, the more the information and the more the attributes you submit, your products are that much more searchable.

Submit channel specific feed
Though there are a lot Comparison-shopping channels that accept other channels feed. If you have the time and patience, its always advisable to build a channel specific feed as per the instruction of that specific channel and upload it. The feed indexing bots on the channel do a better job when the feed is built as per their site specifications.

Don’t quote your price way too low even though you are able to source the product at a very low cost.
Though we all know that these channels are price sensitive we should avoid listing our products at a very low price then the second lowest competitor.

Typically if there are 10 people selling the same product and most of them are pricing the product around $10 do not ever make a mistake of pricing the same product at $5 or so though you might have struck a deal and procured it at that low cost from the vendor.
This for sure will kill the confidence of the buyer and for sure cause some suspicion on the quality of the product and the authenticity of the price