NEW YORK (CNN) -- Can't wait to tear into your presents this year? You may want to hold on. You could pay a price JUST for opening the box.

The Massachusetts Consumer Affairs office is out with a survey that shows more retailers are charging restocking fees -- fees for returned goods (typically electronics) if they're opened or not in a factory-sealed box.

So, if you bought a $300 product, but were charged a 15% restocking fee, your refund would only be $255. And restocking fees can be even higher; anywhere from 10 - 25%. Some retailers charge up to 60%. Overstock.com for example will keep 60% or more of the price of your jewelry or watch if you return it in a damaged box or if any of the manuals or tags are missing.

But it's not only electronics you have to worry about. According to Consumer Reports, you might be charged a 15% restocking fee for appliances, tools and lawn-and-garden products. To avoid this fee, don't open the package if you don't want what's inside. And if you're buying a gift, make sure you ask about restocking fees. Some retailers have a different policy online than they do in their stores.

Returns may be a bit easier this year-that's according to a just-released survey by Consumer World. This year, some stores have extended their return deadlines, and eased policies regarding the return of goods without receipts. Target (TGT, Fortune 500), for example, won't require a receipt for returns -- but that's only if the amount of receipt-less items you exchange is less than $70 a year. Best Buy (BBY, Fortune 500) has lengthened its holiday return period to January 31 -- except for computers. And Wal-Mart (WMT, Fortune 500) has extended the holiday return period on computers and cameras.

Policies vary widely among different stores. But according to Consumer Reports, you'll find the best return policies at Bed Bath & Beyond, (BBBY, Fortune 500) Bloomingdales, Costco, (COST, Fortune 500) Ikea and Kmart.