Regarding DTV Pricing: Official visa fee is 10k THB. However, since the DTV is only available outside of Thailand, prices set by the Thai consulates in local currency apply - at quite a premium.
Example:
Actual current exchange rate:
10,000 THB = 254 EUR
Price asked by the eVisa system in Germany / Berlin:
350 EUR = 13,768 THB
~38% more expensive.
Even higher premiums in other currency regions!
Still a great deal visa. Just letting y'all know.