where can one buy Thai BL novels in the Thai language?

I was looking for Thai books also and no luck (in the US) but I did find an app that sells E-books and audiobooks in Thai, and it has a section for BL as well and a few translated to english as well. Its called MEB. I know its not the same as physical books but I hope it helps!

You can try https://www.ethaicd.com/ if you want hard copies of the books. A few months back they were offering free international shipping. Though there may be conditions attached, its worth checking out. It's in english so that's also a big plus.

For ebooks mebmarket might be interesting, it's available in english if you click on the left bottom corner and switch the language. https://www.mebmarket.com

As for printed copies ethaicd.com as dee mentioned or yesasia.com. Shipping to Germany will always be expensive. Since they changed the law for imports you'll be charged taxes and fees for almost any parcel that's coming from outside the EU. DHL for example is charging a fee of 6€ for each international parcel even if taxes are only 2€. 

 Tsuliwaensis:

thank you, moonchild :) I guess I'll have to make due with ebooks, the prices on ethaicd are just insane, couldn't find anything Thai on yesasia, seems they only have Japanese, Chinese and Korean stuff on there, I even did a search, but for SOTUS for example they only had a Chinese translation for the novel and a bunch of merch.

honestly, I wouldn't mind paying 6 or 8 € extra for shipping, but 50 € for one novel, that's insanity and not gonna happen ;)

Yesasia does have Thai stuff such as DVDs, Magazines and more. They have Thai novels for 2gether or My Engineer for example. Sotus is from 2016 and probably not in stock anymore or has been replaced with newer series. 

The charge DHL is taking is not for shipping. It's an additional fee which they claim is due to Covid-19 (which is nonsense). I know this from my own experience. International parcels were not delivered, I needed to pick them up by myself and pay the fee because according to DHL it's too much of a risk to do the delivery at my doorstep and charging the taxes there (like it was before Covid). They just found an elegant way to make the customers pay more for a non-existing service. I'm just saying you need to be aware of this extra cost as well when you order from a country outside the EU. 

I know, I'm not saying you need to buy those for such unreasonable prices. You don't need to say how much money you can/want to spend or not, that's entirely up to you. I'm merely answering your question where you could buy Thai novels. As for prices and shipping that's up to each online shop. Also keep in mind in Germany we have a reduced tax for books which make them more affordable, I don't know if it's like this in other countries. :)

No, that's not it. I just mean you don't have to explain it. Even if one can afford such prices it's up to them  if they also want to spend so much money. For a normal novel 50€ or USD are indeed a lot of money and from my perspective not a fair prize unless there are some benefits/extras. 

Actually you might be lucky with that. There is a German forum called Nittaya and some people asked the same question as you, maybe it can be useful for you since other people might know a local shop or an address where to get books. https://www.nittaya.de/threads/thai-buecher-in-deutschland.41987/ 

Otherwise Google could help too with a quick search for Thai forums or books. Also check sites like Ebay or booklooker for used books. Good luck! ^^

You're welcome. ^^