How to Sell an Army?

I think the subtitle of this post should be 'What the Hell is Wrong with Me?"

Of late, I've had this itch to sell all of the Space Marine bike models and parts from my collection. Hilariously, during the previous selloff I did of Marine models and kits, I intended to keep ONLY bike units. I'm not sure why, but I'm restless with this new codex.

I have long been "The Bike Guy" at my FLGS. Folks from other shops have actually recognised my army from this or that event without me being at the table. "Oh, it's that Bike Guy!" Got a question about how to use/kit/build/paint bikes? I was the guy to ask.

I enjoyed being that guy, and having that experience and expertise. But with the new book, I'm less in love with my bikes.

The reason for this eludes me. The White Scars chapter tactics are great. Khan is much improved. Bikes overall are far better and slightly cheaper on points. Folks are flocking to bike armies, and maybe that's why I'm less impressed by them lately. They're the new "power build," at least in the early going. I've never been the "power build" sort of player, and I think the situation feels a lot like what Necron and Eldar players, and to a lesser extent Grey Knights, players feel. You can have the original metal models for Necrons, but when you show up at the table and hand over a Necron list, you get that "broken codex" or "bandwagoneer" stigma. I have a minor fear of that stigma being applied to my bike army. It's an irrational fear, as my play group is tight knit and we all know each others' histories, but it's still there.

I also fancy myself as an opportunist and a bit of a 40K "flipper." I've bought and traded for things in the past, and then turned around and resold or retraded them at a profit. It's how I amassed some of my bike army, in fact. I'm seeing bikes being bought and sold online, and feel like I might be able to mkae a little money by selling what is a pretty complete bike army (though it lacks the min/max weapon loadouts). I've never sold a model I've painted before though, and I'm curious if I'll regret it in the long run, and a bit lost on how much to ask for.

If I were to sell the force, it would contain:
1 Captain (armed as a counts-as Khan)
1 Techmarine with power axe and servo arm
1 Apothecary
1 Company Champion with sword and shield
1 Banner Bearer, with magnetized banner arm
1 Storm Shield Bearer
10 basic bolter bikes
2 plasmagunners
2 meltagunners
2 flamers
1 Sergeant with power axe
1 Sergeant with power fist
2 Sergeants with holstered bolters (used as combiweapons)
1 Sergeant with plasma pistol
5 magnetized, metal attack bikes, each with heavy bolter and multimelta parts
3-4 new Scout bikes in box or on sprue
4-5 old scout bikes, unassembled and off sprue
3-4 additional metal attack bike sidecars with heavy bolter and multimelta options for each
A "remaining bike bitz" pile.

All of this is painted to a solid tabletop standard. Not "pro" level, but not "quick dip" level. No decals in the army, all freehand.

Retail, the completed models pan out just shy of $500, then add in the other kits and parts. But retail is a poor gauge of value for a complete, painted army. Of course, it only shakes out to about 1500 points, so it's not 100% "complete."

Anyone sold an army they've painted and built themselves over time? It's easy enough to flip models you never invested time into, but how hard is it to send away something you've put years into?
I wouldn't be divesting myself of all my Marines, obviously. I still have plenty of non-bike Marines to play with, build, and paint. I have several directions I could go in.

What do you folks think?