3 letters .net domains can be worth something, whoever I do not see much value in the listed domains. You might be lucky too find a buyer that needs exactly a domain with the listed letters but in general are they not much worth.
Although I don't appear to be experience as some folks here in domain name industry, but I personally think those 3 letters domain names can worth at least $75+. Plain domain names without going extra miles to develop them or such.
I have sold about 30+ 3 letters domain names in the past and each of them was worth at least $100. Highest price $250 for pkp.net.