Endusers are hard to find even for CVCVs -- just look at how many of the guys holding 20+ CVCVs end up selling them on domain forums. The fact remains that regardless of what type of domain you have (generics, LLL, CVCV, etc), finding endusers is a time consuming (or waiting game) process.
Many triple repeats have "enduser potential" and I've received enough offers on a few particular triple repeats to believe they aren't coming from resellers.
The unfortunate thing about many triple repeats (and this goes for CVCVs and LLL.coms as well) is that when you start having asking prices in the $2000-$4000+ range, many genuine endusers may not be able to afford it and resort to cheaper alternatives.
Most of my triple repeats were registered (not by me) pre-Dotcom Bust or shortly afterwards, so domainer fancy or not, they have a long history of being desired. Names like my FAAA or NYYY literally beg for an enduser, although one might debate whether an actual geo (FAAA) or NYYY should really be compared to an ordinary triple repeat.
An innocent name of mine like IIIT has received me multiple private messages from domainers located in India who ask me if I'm aware of what I own. Or how about AIII being registered 3 entire years before LLL.coms sold out? I have no clue what UOOO means or why Chinese/Japanese people would be interested in it, but I receive offers almost every week on it written (conveniently) in Chinese/Japanese.
LLLT -- Low Level Laser Therapy, google ads, wordtracker, the whole deal.
I'm still buying in the triple repeat market -- bought SSSA just yesterday. Tell me how many LLLL.coms you've seen that are nicer than SSSA
Nothing is wrong with selling to other domainers and it's certainly something one ought not be ashamed of -- I have close to 4000 sales to other domainers this year already. While the large majority of them were under $100, it still adds up.