They seem to go for anywhere from $8 - $35. I'm guessing it's depending on condition and interest in the auction.
Another quick Googling for specs showed student model and silver-plated. "Probably."
Flutes:1975 Gemeinhardt M2 in chrome nickel;1982 Armstrong 80;2006 Yamaha 584
Piccs:1978 Artley piece of crap 15 P;1982 Gemeinhardt 4S;1980s? Armstrong all wood (no model)
Bass:2006 Jupiter di Medici G0199
Treble:20?? Guo New Voice
+ many flute-cousins