Tbh I don't even think the prices for his adapters are too high, the products seem solid and thoughtful and the prices are appropiate in my opinion.He's a very small shop and I think he really does try to be fair. Even this adapter may seem a little pricey, but considering that just to make a muzzmod you need the glass piece and you have to cannibalize a cooling unit, it's not so bad.
It is just hard to understand, why every asian shop offers low shipping costs while I would had to pay 14.80$ at Delta3DStudios. They could just use a padded envelope and ship it for 2$.
The Grand Total is $39.30 for the water adapter + shipping to Germany and that is just way too high, at least in my opinion. Well since I am not forced to buy Delta3D products its just a personal opinion and I am happy for every one of their customers who can afford their products. I am very sure they offer the best adapters on the market.