I just purchased one a couple weeks ago after doing lots of research. I am in the states. We have a plethora of aftermarket items that can be purchased for the q500 4K as well as merchandise right from the manufacturer. We can also get parts off of Amazon and eBay
I have a Q500 4K in near mint condition. Hard carry case, spare set of props and battery charger but I have no batteries. I've not used it for about 3 years and all my batteries are toast. I live in the UK, south Manchester area. It's yours for £250.00 but if you want it, you'll have to collect it. Also, I am away for the next couple of weeks, so you'd have to wait a while... It's a great drone. I flew it in the practical flight test when I took my PFCO, way back in 2015. Anyway, let me know if you're interested. It's also awesome when you turn the GPS off and it turns from a very soft easy to fly drone into a bit of an animal!