I have also fallen foul of mistakenly thinking I had a bargain from looking at the prices on Chrono24. Interestingly, my mistake was also with an electronic watch which I bought rather on impulse without full consideration to the fact that these watches are hard to fix (if not impossible) and so it has a finite life. It is a nice watch, but in hindsight I paid over the odds...hey ho...life itself is finite! So I just enjoy wearing it.
They say a wise man learns from his mistakes, a fool doesn't. Subsequent watch purchases have been much more thoroughly researched and thought through and, no doubt, you will probably be the same.
The 'silver lining' to the cloud, however, is that if you are selling on Chrono24 and have your watch at a reasonable, fair price, it's great! By comparison to all the others, yours stands out. I've sold two watches on there for what I had considered to be reasonable in prices, pretty quickly... Good luck.