Selling stuff online? This app helps you compare prices to sell online or at an auction

Are you selling or buying online in an auction or even on Craigslist?

How do you know what price to ask or pay for the item?

There's a free app that can help you figure that out.

It's called Bidvoy.

It monitors more than 600 million ebay auctions worldwide and it comes up with the average price for a similar item.

Data Doctors Ken Colburn says it can also tell you if that price is going up or down.

It can distinguish between prices for used items or newer items.

Buying a house or a car, there's another app that can help you out.

In most cases, a notary is required to prove signatures and identities.

But sometimes it can be a hassle to find a notary and take the time to make it happen.

Notarize allows you to work with virtual notaries through web cameras.

You can show ID and it watches you sign documents. And it's legal.

Colburn says it does require you to trust the site with important documents.

It also has a $25 fee, but if you're short on time, it may be worth it.

As with anything you download, make sure you read the privacy policies.

You need to know what you give up in order to get it.

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