Not sure if this has been mentioned before or not. I did a search and it pulled up nothing in this forum.
I am the laziest ebay seller in the world. I am also the most un-employable person on the planet. Since I am a special needs personality I have developed ways to keep an eye on hot products and sellers sales volume.
If you ever need to find some new hot selling products and you need to see how much a seller is pushing these tools may help you out.
The first one lists Ebay's top 100,000 sellers. You can also do a country specific top seller list. This list will make mincemeat out of trying to find the stuff that is moving. It's not a do all be all solution since I have seen many sellers with 50 or 100 feedback put sellers with 10,000 FB to shame based on monthly sales volume/profit per item sold.
SellerDome.com | List of Top 100 Ranked eBay Users World-Wide
The second one lets you plug in any seller on ebay and it will give you a quick rundown on his/her monthly sales volume. Knowing the product profit margin you will make quick work of what his/her rough profit per month is.
eBay Seller History Tool
Once you locate a potential new item the 3rd tool allows you to make quick work of any product being sold on Ebay. It will tell you things you never even thought of.
Free eBay Research | eBay Research Tools
Once you are sure of the item you can use this break even point/ebay listing fee/paypal fee/FVF fee/shipping fee/shipping profit/net profit calculator to determine your rock bottom break even point and what to expect in profit per item sold for various BIN/free shipping/shipping is extra scenarios.
This one has a trial version (works forever). However, it does not (in the free version) figure in all the fancy extra listing features doodads you can add to your auction. If you need the extra features doodad figuring see the second one below.
EBgo eBay Profit Analizer : EBgo Break Even
A tip of the hat to imjustme. Here is a free online fees/profit/loss calculator.
eBay Fee Calculator Version 2
eBay Fees Calculator All on one page Version 1
There are a few other private tools I use. One is a really cool app that monitors Ebay every minute updating my preselected items with alerts on any new bids and any new sales. It's kinda mind boggling to load in say 3,000-4,000 items from various ebay sellers and then turn it loose. It's like watching a huge store in real time as the buy it nows and the bids come in minute by minute on my screen. It's one thing to look at how many products per day a seller lists, it's another to feel his/her sales coming in minute by minute, hour by hour all day long. There's always room for one more dog at the mile long feeding trough.
Another one I use monitors what the super hot high bidding items are in a category.
P.S. 1. What do the top 4 highest rated sellers on Ebay sell? All 4 sell the same type items. What could that be?
2. Out of those top 4 highest rated ebay sellers, 2 out of the 4 registered only 3 days apart from each other in late July 2000. Just a coincidence??? A 3rd seller out of those top 4 registered only a few months before July 2000. Another coincidence? Miracle of miracles, someone get behind me because I'm about to pass out, those top 4 sellers each have around 68,000 items listed give or take 1,000. That's just a coincidence folks.
3. What seller only carries an average of 60+/- products at any one time yet averages a little under 7,000 feedbacks a month over the last 6 months?
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Strategies For Locating Hot Items, Hot Sellers, Fast Profits and Monthly Sales Volume 
