Reputable site for buying expiring, deleted and aftermarket domains
GoDaddy Auctions is one of the most comprehensive and reputable sites for searching for and buying expiring, deleted and aftermarket domains.
Their backordering service is also one of the most reliable with a track record of registering expiring domains before anyone else can grab them.
Auction site selling new and established websites and premium domain names
Flippa is an auction site for selling established websites, new websites and premium domain names. So if you are thinking of jumping into a new niche I would always recommend checking Flippa.com to see if there are any websites for sale that are already established that you can pick up for a good price.
The largest broker of premium domain names
BuyDomains is the largest broker of premium domain names, claiming to have over 4,000,000 domain names for sales in their database and I believe it. I have purchased numerous domain names from them over the years ranging from $200 to $10,000+ and they have always been very professional to deal with.
One piece of advice... never pay their “asking price”. With a little negotiation you can typically get them down to 50-75% of their asking price.