Michael Jackson's death has prompted a warning from the Better Business Bureau. Since the pop singer's death -some people are trying to cash in on the renewed interest in the singer.

There's been a rash of memorabilia hitting e-Bay and Craig's list at inflated prices and the BBB warns those prices are going to drop over time. As well as existing memorabilia, commemorative items are being mass produced from magazines to t-shirts. But because the value of collectibles is dependent on how rare an item is --these mass produced items are unlikely to increase in value.

If you want to buy something to remember Jackson by you'll have to do your homework on appropriate pricing before you shop especially if you're hoping to buy something that will increase in value. Here are some tips:

For autographs --you'll want to confirm authenticity. Ask questions about how the seller came to be in possession of the item. If they can't answer -- walk away.

You'll also protect yourself by paying with credit card. You can then dispute the charge if the item turns out to be fraudulent.

Deal with reputable sellers. On eBay read buyer reviews. When shopping on Craigslist, go local and never wire money as payment. If you're buying through a store -check it's rating through the BBB.

Finally, don't be fooled by empty advertising claims. Just because the seller claims that the item is of limited edition, it doesn't mean that there weren't millions made.

With a report from CTV British Columbia's Chris Olsen