I've seen some people comment about losing the link value of domains that have expired and picked up, but what about non-expired domains? Let's say a competitor is going out of business and they still have a year or two left, and we buy their domain and site. Is there a risk changing registrant info and registrars, even if I keep their site up and mostly the same as before? I was under the impression that I'd want to keep it under their name so as not to hit the uber-reset button on the domain's inbound link value.
If your domain name is related to a particular niche, then you may find success by advertising in forums that are related to that niche. Simply placing a link in the signature of your posts can tremendously speed up the selling process. While it may be possible to find prospective webmasters on niche-specific forums, it is generally better to advertise on webmaster forums, where there is a high volume of potential customers.
In theory, you could technically acquire a domain for $10,000 and be able to sell it for $100,000. You could also acquire a domain for $10 and be able to sell it for $100,000, $10,000… or $100, you get the picture. Because of this, it’s hard to recommend a perfect starting budget because your strategy, experience, and the pace at which you learn will hugely affect your buying and selling decisions.