I owned three models of Wersi keyboards back in the 80's & 90's:
The Wersi Alpha + Beta + Pegasus.

In all fairness to Wersi, I have NOT heard any of their keyboards live in the past 10 years.

One of the things to consider with Wersi...is that you will have an extremely difficult time getting anything for it upon trying to re-sell it on e-bay or elsewhere.

At least with the other brand names of keyboards mentioned in this forum you probably can get something for them however minimial it is.

I sent about $12,000 worth of Wersi Keyboards [2 keyboards] to the dealer in Lancaster to try to sell on consignment back in 1993. I have not received a "check in the mail" yet.
So, to say that Wersi instruments depreciate more than other brands would be a fair statement IMO.
Rfinnshw