Amazon Official UK - https://www.amazon.co.uk/Overlord-Blu-ray-Naoyuki-Itou/dp/B01N74VZ3J [United Kingdom: ALL IN STOCK]
Amazon Official US - https://www.amazon.com/Overlord-Blu-ray-Naoyuki-Itou/dp/B01N74VZ3J [United States: ALL OUT OF STOCK]
eBay UK Season 1+2+3 English Audio (Only 1 Left) - https://www.ebay.co.uk/itm/333794690977?hash=item4db7b6c7a1:g:s9wAAOSwPKlftiz8
eBay US Season 1+2+3 English Audio (Only 1 Left) - https://www.ebay.com/itm/175011235824?hash=item28bf7b87f0:g:GEwAAOSwRnZhhvga
Amazon is 20 Pounds for 1 Season UK,
eBay is 25 Pounds for all 3 Seasons,
So if you want to buy, I'll buy the eBay one quickly as only 1 left.
If that solves your question then... there.
Answer for Scalping is, simply put, No. It is sold by and dispatched by Amazon themselves.
Overlord is my number 1 anime, in terms of epicness and story.
Though Season 3 was a let down due to the poor CGI, still very enjoyable, just a let down because it could of had way more potential.
Hope this helps with you enquiries!
Quick Edit! - If you need to find more through eBay with outstanding reviews, here -
If you use that link you should be able to find loads of (All 3 Season) ones for just over 20 Pounds.
But, make sure to buy in your Region or shipping costs will be pretty high (like $26 for just shipping if your in US, but trying to buy from UK)
Scalper Situation: In the United States on Amazon, it seems like people are selling it at high prices, by that I mean more than RRP. BUT! eBay still is not overcharging and in fact, has really good deals (ALL 3 Season FOR JUST $38) (DVD)
Scalper Situation 2: In the United Kingdom on Amazon, everything is pretty much fine. (ALL Seasons IN STOCK) Again, eBay is doing solid deals for every Season DUBBED, for just 30 Pounds.
So in my books (My opinion), If it was Scalping, it will be like the GPU's and eBay will be one of the 1st places to way overprice things from past experience.
Conclusion: It seems to only be affecting the US, so the best I can do for you is to recommend the DVD Versions instead. You can still get Blu ray Versions in US through eBay at reasonable prices but that is all I can help you with at the moment unfortunately.
So if your in United Kingdom and want to buy Overlord Blu rays, your in luck!
Sorry for making this so long like a PIP Claim form... Just trying to give as much information as possible.