NADA online doesn't go that far back.
KBB.com suggests:
1987 VFR700F2
$1840 retail, $1210 trade-in.
1993 VFR750F
$3080 retail, $2090 trade-in.
This is for bikes in "Good" condition - worth probably half that or less in non-running/marginally-running condition.
Quotes worth precisely what you paid for them.