Ascii, when I bought my Peg1 back in 2002 it was also more expensive than it is now and I was happy to give away my money for that and am happy with it since almost two years now (I am that satisfied, I didn't even asked for the PegII upgrade or the AprilII fix)....
But to the point: If you want to sell G4s in favour of G3 then do so. If it is no more produced then okay. Just sell the last units for the old price and then drop it due to being sold out. Easy as that. But if ppl have a demand for G3 then one would do good to deliver this demand. The 299 EUR scheme was just a hell attractive and I found some more ppl (little companies)who were interested to give it a try, but 500 EUR is too much for them.
Also there was a G3GX modul announced, well where's that then?
Somehow I do not get it why it should make sense to rise up the G3 price that much. If my price informaton is correct the difference between a G3/600 is around 100 US $ compared to the used G4/1000. And why is the 7447A still not used?
A 1000 Mhz 7447AHX1000LB is even listed for around 10 US$ less then the used 7447RX1000LB (The 7447AHX1000NB version is only 10 US$ more than the currently used G4 - and the 7447AHX1000NB is the object of desire - that one can easily run passively cooled!). And why no faster G4s? The 7447A is available up to 1420Mhz, the 1267 Mhz version (7447AHT1267LB) is only around 60 US$ more expensive than the currently used G4.
Whenever you're sad just remember the world is 4.543 billion years old and you somehow managed to exist at the same time as David Bowie.
...and Matthias , my friend - RIP