What is the best way to successfully purchase domain names through private acquisitions?

In my previous attempts to privately purchase domain names, I have encountered several challenges. Firstly, contacting the owner can be difficult due to unresponsive emails or unclear contact information. Secondly, cold emails must be worded effectively to grab the owner's attention, however, calling may be a better alternative if their phone number can be located.

Lastly, domain brokers can be too expensive and may charge a fee even if the domain cannot be purchased. Ideally, I am looking for a broker who only charges commission if the domain can be secured through their negotiation services. The process would involve naming the desired domain and allowing the broker to contact the owner for negotiation purposes, with commission fees being charged only upon successful purchase of the domain.

If my understanding is incorrect, please let me know. However, it is possible to utilize GoDaddy's Domain Buy Service, which allows for only the loss of the initial fee in the event that the domain cannot be acquired. To explain further, this service provides a designated broker who will reach out to the current owner of the domain and negotiate a price for you.
In the event that the current owner agrees to sell the domain, you will be required to pay the negotiated price in addition to a 20% commission, after which the domain will be securely transferred to you. I found this information on GoDaddy's website with an example of a domain I have not yet listed.

Instead of GoDaddy, I suggest using DomainAgents.com for purchasing domains since it is more cost-effective and provides incentives for the owner to respond. Although acquiring domains through stealth or private means can be difficult, some individuals with perseverance and connections have been able to do so successfully.
 This can be particularly challenging when the domain is owned by a professional domain seller rather than a regular individual.

Usually I try not to buy, but to register new one, I search short and popular domain names at foreign languages of counries with big populations, written by latin letters, such as "money", "goods", etc.

When it comes to successfully purchasing domain names through private acquisitions, there are a few strategies you can follow. Here are some suggestions:

1. Research and Identify Owners: Start by researching the owner of the domain name you're interested in. Use domain name lookup tools or search engines to gather as much information as possible, such as their name, email address, and phone number.

2. Craft an Effective Email: When reaching out to the owner via email, make sure your message is concise, clear, and compelling. Describe your interest in the domain and your willingness to negotiate a fair price. Personalize the email to show that you've done your research and understand the value of the domain.

3. Explore Alternatives: If your initial email goes unanswered, try different contact methods. Look for the owner's social media profiles or explore domain forums where they might be active. A cold call could also be effective if their phone number is publicly available.

4. Utilize Domain Brokers: Consider working with a reputable domain broker who specializes in private acquisitions. Look for brokers who only charge a commission fee upon successful purchase of the domain. They can act as intermediaries and handle negotiations on your behalf. Make sure to verify their track record and reputation before engaging their services.

5. Be Patient and Persistent: Domain acquisitions can take time, especially through private negotiations. Be prepared for potential setbacks, unresponsive owners, or unsuccessful negotiations. Stay patient and persistent in your efforts, and consider alternative domain options if necessary.

Every domain acquisition is unique, and success depends on various factors like the owner's willingness to sell and other market dynamics.