Don’t get me wrong, I’m not saying marketing your domain is not important. But, if you’ve bought a bad domain and you do (and overdo) everything laid out in this section and more, it’s still very unlikely that it would sell. It’s like spending car flipping and spending a huge amount of money, time and effort perfecting a car’s paint job, except that this car’s engine is completely fried. You’ll never be able to drive it anyway, no matter how awesome the paint job is, it’s irrelevant.
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When you are selling a domain name, you don’t want to suffer because of failed transactions or being tricked by defaulters. Safeguard your monetary dealings; the best way to do this is to take the help of a secure domain transfer and escrow service. The escrow system is highly beneficial because a buyer has to deposit money at the trusted source prior to purchase, and the dealing between a buyer and a seller takes place through a secure domain transfer and escrow service. This makes the transaction safer for both parties with the involvement of a neutral third party.
Many non-savvy internet users may not even be aware of the existence of other extensions. That said, because there are many new extensions popping up every now and then, you can often find amazing one word and 3-letter domain names with these new extensions that are otherwise almost impossible to find unregistered in the .com world. Additionally, these new extensions are becoming more and more familiar to users every day, hence it's almost certain that their value will continue to increase as time passes and wider adoption manifests. 
Some buyers are a tough nut to crack and they may quote a ridiculously low offer. Explain to these buyers and convince them why the domain is worth more than the quote. If the potential buyer doesn’t agree, fret not, just move on to the next one until you find a willing buyer. Once you finalize the deal, then it’s time to find the best payment mode for the transaction.
The first thing you need to do is signup at Namejet in order to get your account (signup is free).  You can then use their search functionality to sort through all the upcoming domains for auction.  Place bids for $69 on the ones you want to go to auction for.  If you bid on 100 different domains for $69 each, and there is 50 bidders for each auction you need to understand you aren’t going to owe any money, you are not committing $6,900 to Namejet.  By entering that $69 you are getting an entry into the live bidding when the 30 days expire.  Only if you are the ONLY bidder on a domain would you automatically win the domain and owe $69 to Namejet.
That said, my recommended budget for beginners would be $500+. Using this budget you could buy a bunch of high-potential $10 domain names, expired/dropped domain names or a mix of both. It’s very important to invest only what you can afford to lose and treat this as a side hustle till you get the momentum going. As you gain experience, industry expertise and some sales under your belt, you can then consider slowly growing your business into a full-time gig.