Everything is dirt cheap, EXCEPT the 570.
Sometimes the scarcer Teks go for decent money - the very early gray
cased scopes or the oddball 519 come to mind (but not 570 money). Some
of the plugins do OK as well, like the polar plotting one, or the very
difficult to find engine analysis one (sorry, I do not remember the
numbers of these).
But yes, the truth of the matter is that right now, the supply of
classic Teks is far, far greater than the demand, and this is likely
to be the case for the next 10 years.
--
Will