BEWARE THE SPONGE!!!
Inkjets waste tons of ink into a sponge-diaper with every cleaning cycle, that over time gets saturated and become prone to leaks. You DO NOT want ink from it spilling all over wherever you put it.
Other than that, it's hard to tell. If you can get the nozzles clean, and it doesn't have software/firmware issues, a general disassembly, cleaning, and assembly, can bring a printer back to life. It usually takes an amount of time and effort that makes it not worth it... but if you have more spare time than change, it might be worth a shot.