Too many people think they're bikes are gold or want to recoup every penny they put into their bikes.
Others feel all the time, effort and expense they put into customizing their bike makes it worth more.
I totally understand that feeling.
I put in over 12k worth of upgrades into my concours, a bike whose blue book value is less than a 1\4 of that.
No one cares that I have $3500 in the suspension, nearly the same in engine upgrades, a $1000 custom Russel seat.
I listed the bike for slightly more than blue book value and was still lowballed by people, so I ended up just parting out the accessories, by removing less than 5 bolt on items, I got my asking price back and I still have the rest of the bike fully useable that I'll sell for KBB.