I think Stingrays have definitely dropped a bit, but I feel the cosmetically superior ones (birdseye maple necks / old style bridges) should command a more reasonable price of £700+.
With the Warwicks - a couple of people have unsuccessfully tried to shift there Warwicks on here ridiculously cheap. It appears the problem isn't what is being charged, but that everyone is skint ! That Streamer ProM 5 was down to less than £400.. which is crazy in my eyes.
And back on topic (sorry OP ! ), replied to your PM Thunderthumbs .