Another nice thing is an online list of your own verified gear, that you can password protect. This list gives you the new RRP (USA $ amount) and the average used price of you gear today as well as the new price and the totals of each. This really reminds you the value of your gear and the cost to replace, also a handy plus if you are making an insurance claim. You can transfer ownership of your gear to another person, if you decide to sell anything, with a few clicks and it will go straight into their gear list already verified.
The last nice thing you should know about Lens Tag is that the service is offered for free.