Tried outbounding via email, website, Twitter, Instagram, Linkedin etc. Probably no more than 5% reply, if that. Most common replies: thanks, no thanks, thanks but no thanks, not interested, I already have a domain (!) & one person on Linkedin who took particular offence that I had contacted him to politely inform him of a domain I had for sale that may of been of interest to him that he replied straight away telling me to f@~k off ! And just in case I hadn't got the message, he followed up a few minutes later with 'no really, you can just F@~k off' or words to that effect !
I think part of the problem is that most people aren't aware that domain reselling exists, some simply don't get it. Some take particular offence at the whole idea, I guess some don't understand how it all works & perhaps don't want to get involved & many think it's some sort of scam. Amazing how many people clearly don't even read the emails & you get bombarded with automated replies about their business, realtors are particularly good for that !