I can't say for all boxes but heres a few I recall:
Extra clean working GF-9292 I paid $127
Mint working RX-5250 $150
Mint CFS-D7 in Box, as new $40
Marantz No Working Deck CRS-4000 $125ish
Telefunken Studio M1, deck bad, $60ish
Toshiba RT-S391 (like Gluecifers) no remote $60ish
AIWA TPR-950 $48ish
VZ2000, needed belt, otherwise excellent $160 or so.
Mini Sansui FX-500R mint working $55ish
I paid around $150 - $175 for a Sanyo 9998, but that was later maybe 2006, sold to IRA for $175??? (Ira may remember)
All these still had shipping, but that was less than today.
Most medium size better boxes were $100 - $200
I cant recall on the big boxes, as I did'nt get into the big ones and they were rather not common on eBay yet like today.
Panasonicfanfarthead over at S2G once stunned us all by bidding $1500 for a RX-5350, as any oldtimer here might recall.
I hav all my prices, I will look up others, these are just top o me head................