eBay is your best bet. I would break them up into smaller lots, or sell the whole thing. You can easily get a few grand for that. Look some up, some are worth a lot more than others.
Do you need D&D Miniatures?
No, you do not need to use miniatures. Miniatures and grids are not necessary for playing D&D 5e, they can be useful visual aids for combat as you can see exactly where you are relative to other characters but, outside of combat, there is little need to use them.
The official scale is 28mm, which translates to 1:64 model scale. But scale-creep has been affecting Games Workshop miniatures for decades, and true 1:64 scale miniatures will look a bit shorter, and very skinny standing next to an Imperial Guardsman, or Astra-Whatever-They-Call-Them-Now.
Is age of Sigmar 28mm scale?
Both the Sigmar AND Khorne minis seem over buffed. They’ve gone from 28mm heroic scale to 28mm Godly Scale. They just appear more like toys to me now.
Is 40k tabletop fun?
In my opinion, warhammer 40k is one of the best tactical board games I have ever played. It is so easy to create stories and scenarios for your armies, and the gameplay itself is very fun(most of the time). They buy and paint, and put their models on cool looking backgrounds, and never use them in game.
How fast can space marines run?
Some books has space marine moving at 35–40 miles per hour, while others had them clocking in at 50–60 miles per hour. I personally think they can sprint at 50–55 MPH at the very least. A space marine could get a ticket on a highway with his speed.
Can Space Marines swim?
They can’t swim and only have their suits and vehicles to keep them alive in an underwater environment. Swimming and wooden stairs are their only weakness. Space Marines are perfectly capable of fighting underwater.
The Primaris Marines are so new there’s just no time for any of them to fall to Chaos. Also, presumably since they’re mini-Primarchs, they’re somewhat more resistant to the wiles of chaos than your standard marine.
Can Chaos Space Marines die?
They die, same as you & I. There are, of course, exceptions (Kharn & Lucius being two), but in the vast majority of cases their sould simply dissipates from the material containment into the Aetherium to merge with the spirit of his god.