I have a WK-3500 for sale. Good condition (some wear on corners--that's how it was when I bought it--store demo).

Everything functions properly. I haven't put a scratch on it since I bought the unit (minus the light wear on corners at time of purchase).

I still have the original box. Manual is somewhere-I'd have to hunt it down I'll also throw in a sustain pedal I bought from Radio Shack (not the best, but does the job).

If anyone is interested email me with an offer. I've owned it for several years, and paid over $300.00 for it new (it was slightly discounted for being the store model and light marks on corners). If anyone wants pics I can email them to you.

Thanks for reading.
Cheers!