@digger
Thanks for the advice, actually I have been buying on Aliexpress for a short time, I check the price and the reliability of the seller, number of followers, how long he has been registered, feedback, I also use three extensions on the browser, AliHelper - shopping assistant, Alitools Shopping Assistant and Up Assistant, they give me a rating with a score.
The T420 actually costs about 90 euros less, it depends on the shop, in Italy I found it for 215 euros, if I get to 300 euros I think it is better to focus on the basic JBC model like the JBC BT-2BWA
The problem with the Aixun T413 is that it is not compatible with the original JBC handles, I had contacted AiXun via the AiXun Tech page on Facebook and this is what they replied to me:
Aixun Technology
T413 is equipped with a self-designed temperature control algorithm and intelligent software, so the traditional handles of some brands are not able to adapt to our system to enjoy more user-friendly functions.
In addition, a user who has the T413 told me that the station did not recognize the original JBC tips, it was necessary to heat the tips first to make them recognized.