@Maxim **********
visa prices are the same as before. An imaginery "changeover" fee that can't be published is the extra agent fee you are suggesting.
There is no extra agent fees and never has been except the actual immigration facing agents that hold people's hand at immigration.
All the schools charge what they were charging pre COVID, just have to accept the convenience changeover fee.
If you get your initial education visa outside Thailand, the price is normal.
There's never been a 25k one year visa option in the 12 years I have been in Chiang Mai.