aspringv:
I tried my luck at both locations a few years ago and came away empty-handed. For the most part, you'll find cheap knock-offs of consumer grade accessories and inexpensive finished products. The few shops that had parts of interest also had prices that seemed excessive to me. I live in the US and am probably spoiled by generally lower prices (hmm, that's undoubtedly true). Your mileage may vary. If you have the time, they are fun places to wander through, though.
Good luck!
Regards,
Scott