The hardest part is in finding names that you can use to make money. You can buy names on the domainer forums, and wholesaler rates tendto be about 10% of the end user price, and that price difference reflects the difficulty you may have in selling names, especially if you haven't bult a retail selling site. You can use the auction sites,but the costs are fairly high, and there is no guarantee that you will sell for a profit if you are new to the industry.
One low cost way to gain experience is to use expired lists like
Expired domains, and I am a member of that service. You should be aware that any names on that list will have been picked over at various stages before it gets to the list, and people wait to see the latest drops as they appear in the list,and they will grab anything that interests them as soon as it appears. This means that you will miss a good name if you do any research before you attempt to register it. I pay less than $9 for a registration, and this is possibly the cheapest way to own a viable name if you can judge its value quickly. I would start with this service, and register a couple of names. Many names offer free market sites and sales landing pages, so you should use one of those.
Valuing a name is quite difficult, as like all sales products, itd value is what somebody will pay for it. Valuation sites can help, but they are not very accurate. One service worth looking at is
GoDaddy domain appraisal. Lets take my latest acquisition, and this is a "hand registered" name. This means I explored some possibilities, and found that it was available, and thus it cost me less than $9 for ownership of a one year renewable lease. This is
GuardPets.com. I posted the link as I am currently building an experimental landing page and site, and I can discuss this in subsequent posts if there is enough interest. Godaddy values this at $1,500, and the keyword "guard" has average sales results of $1,999. Guard dogs are an expanding interest in the current economic crisis, so I may ask for 0.3 Bitcoin for an immediate sale. In the meantime, I will add some information pages, and some paid links to earn some revenue whilst I wait for a sale. Once I've worked out the basic structure of the site, and affrf dsome useful content, then I do a bit of search optimisation and link promotion.
I looked at some other keyword sequences, and PetsGuard.com is available for purchased at £3,474.50, and Huge Domains are offering GuardPet.com for $2,095, so I am quite pleased to have found this name, although I suspect it will take some time to find a buyer.