Tankhobby

Zhukov's Attic has some 1/6 scale 21st Century M5 Starts for sale. I buy 1/6 scale accessories from them every once in a while but am not affiliated with them. There are some other 1/6 vehicles also.
These tanks are getting harder and harder to find, sometimes they are listed on eBay so it's surprising to me to find some listed here for sale. Maybe from an Estate?

https://zhukovsattic.com/collections/wwii-allied

Max-U52

Those are actually fairly decent prices. It doesn't say if they're new or used but they look used to me.

I have purchased from these people before and never had any problem. This is where I got the ammo and ration crates for my desert raider project.

I think I would email them for more information before I spent that much money. I got mine on eBay for $250 but I got lucky with that one and I still had to pay ninety dollars shipping.

Tankhobby

I see they have listed them on Evilbay.