Modern Grand Seikos long term resale value?

[IS2000]

Hello there,
I recently acquired a LE SBGH323 “Red Dragon” to have alongside my other two Grand Seikos. One of them being a Shunbun. The two watches are quite similar but different enough to have in the same collection. However I was having an idea of selling a Shunbun to fund my next purchase. I was offered around USD3600 for a mint 2 year-old watch which seems a bit low. Low enough that I was thinking to hold on to the watch.
My question is, I have a limited experience with GS watches and how will they hold value in long term if I decided to keep them for like the next 10 years. Prior to owning Grand Seikos, I usually only purchased Swiss watches. Most of them have appreciated in value overtime except a Rolex YM which seems to be selling at the same price when I bought it twenty years ago. My two Tag Heuers on the other hand lost half of their values overtime. So do you think that something like a Shunbun will still be worth $3-4K in like 5-10 years?