For many people, one of the signs of aging is gradual hearing loss. Many people resist buying hearing aids because of a reluctance to admit a disability or they don’t even realize they have a hearing problem. But perhaps the biggest deterrent? Hearing aids can cost thousands of dollars each, depending on the equipment:

About 37 million people suffer from some form of hearing loss — from minor impairment to total deafness — in the United States. But less than a quarter of the people who could benefit from hearing aids actually use them. One reason is people’s reluctance to admitting a disability.

But cost is a big factor, says Lise Hamlin, director of public policy for the Hearing Loss Association, an advocacy and lobbying group. Hearing aids average about $2,000 each, Ms. Hamlin said, “but I’ve seen prices range from $1,400 to $5,000 apiece.”

While a portion of hearing aids may be covered by insurance (check yours), it’s important to know that hearing aids aren’t covered by Medicare, though the evaluation visit is covered.

There are several styles of hearing aids including: behind the ear (BTE), in the ear (ITE), in the canal (ITC) and completely in the canal (CIC), But, no matter the style, consider these tips before buying hearing aids:

1. Seek recommendations for hearing aid providers. Ask family and friends, or perhaps your doctor about their experiences and look for a provider that offers a variety of products. Be sure to note any Better Business Bureau or local online feedback.

2. Ask the audiologist (who tests your hearing) what hearing aid features you need and be sure to get a copy of your hearing test results.

3. What is the total cost of the hearing aid? Is there a separate fitting fee? Are you charged for adjustments?

4. Is there a trial period for the hearing aid and are any of the fees refundable?

5. Check the contract for the warranty period and loss or damage coverage. Does the contract cover repairs or replacement? Where are repairs made? Will the hearing aids need to be sent away to get fixed, or are minor repairs done in the office? What about batteries? Hearing aids use a lot of batteries and they are sometimes covered in the contract.

Hearing aids are an important investment, so it’s important to know what to look for and what to ask before you make a purchase.

The Hearing Loss Association of America offers some advice about financial assistance for hearing aids and be sure to check out the Lions Club International’s Affordable Hearing Aid Project.