Before it was stored was it flushed with cleaning solution? Depending on the model it may not be worth fixing, unless new printers are extremely expensive in the Netherlands. At bare minimum you'll need print heads, cap tops, and dampers. Probably require new ink lines. If you can't do the work yourself than add the cost of a technician.
Like BigFish mentioned you can always trade it in. If you trade it in find a reputable dealer with great technicians closest to your shop and buy whatever printer they're selling.
All new printers are quite good now. Of course my Roland is 10 years old and still making money.