No, you can not claim Fair Market Value instead of what is stated on the 1099-Misc being provided to you.  However, as an independent contractor, you are able to claim your business expenses that you incurred through out the year.   See Publication 334 - Business Expense.

To find where to enter your business income and expenses in TurboTax follow these steps:

1. Select Search in the top left of your screen,
2. Click Go to Schedule C,
3. Click Add another line of work,
4. Answer the questions.

I too am a Best Buy Product tester and usually in Turbo Tax it just lists the value from #7 on the 1099-Misc in the "Other Income" line.  This year it is telling me that I am self-employed and putting the dollar value in "Business Income and Expenses" and filling out a schedule "C".  I am not in business and not sure why this changed.

SOLUTION FOUND:

Even though you weren't paid in cash you still need to include the "income"(value of goods) on the 1099-MISC in your return. You can enter the 1099-MISC in TurboTax as "Other Common Income,"  which is reported on line 21 of the 1040 and  will not generate SE tax.  Please use the following steps:

1. Click on Federal Taxes > Wages & Income. [In TT Self-Employed:  Personal > Personal Income > I'll choose what I work on.]
2. Scroll down to the Other Common Income section. 
3. Click on the Start/Revisit box next Form 1099-MISC.  [See Screenshot #1, below.]
4. On the screen Did you get a 1099-MISC?  click on the Yes button. [Screenshot #2]
5. On the next screen, Let's get the info from your 1099-MISC, enter the information from the 1099-MISC.
   [Screenshot #3]
6. On the following screens, answer the following questions:

• Did it involve work that's like your main job? No.
• You got it in 2016
• No, it didn't involve an intent to earn money

      7.  Continue through the rest of the interview screens. The income will appear on line 21 of form 1040 (Other Income).