A few months ago, I registered a lot of domains and listed them for sale on sites like Sedo and Afternic. However, none of the domains have sold or received any offers. I was wondering what steps I should take to make some sales before the domains expire. Should I promote them in some way, lower the prices significantly, or put them up for bids? I’d appreciate it if you could share what strategies you use for your domains when they’re about to expire and you decide not to renew them. Thanks!
In addition to what wacky said, I would suggest you look more carefully at what domains you choose to register, because it's very easy to get carried away with registering a lots of names, due to the low cost and the ease of registering names - almost anyone can do it who has a little bit of money.
If a domain is available, it is either a really really good thing or a really really bad thing - there is no in between. Mostly though, it will be a really really bad thing because almost everything that is obvious and thus valuable has long been snapped up and you and millions of people are now left with scraping from the dregs of the barrel or worse ( i.e., haveducks.com, purpleknives.com, superdoorframes.com, wetcars.com and tons more junk names like those).
You really don't need marketplaces if your domains are good as buyers will find you from the Whois. If your names are garbage, then you are best to do what others have suggested and offer them at bargain prices, like $100 or less, or group them together as a portfolio auction.
I am not sure which sites offer portfolio buying but people on here will likely know of any and of course, you can offer them up in this site too.
If you get no interest for a name, I would be inclined to let it expire, unless you can find at least 1-2 good reasons to justify to yourself with keeping it.
Just don't be delusional in your assessment, just because you registered the name, which is very easy to do and many people on here will have probably done this in the past, including myself.
There are just too many people who jump into domain name buying, presumably because they see the low cost of doing so and ease with registering names as appealing. But when something is easy to do, anyone can therefore do it and anyone means many millions.
Educate yourself on this area before you spend another penny, which is free to do and will serve you well in the future.