Dear Kenji,
Great that you found good value in Wingwah trade in. Happy for you.
Im not as fortunate as they quoted me extremely low (i feel like being lowballed and they think that im stupid or no idea on the market price) for few of my watches.
With a little patience, i got to sell @ over 40-60% of what i've being offered thru other channels.
To OP, if you need quick cash, at least survey your watch over at a few places before letting go. (time square, amcorp, publika, wingwah to name a few).