Here is an example, boattrader for 1980 21 foot boat <TABLE cellSpacing=0 cellPadding=0 width="100%" align=center border=0><TBODY><TR><TD width="20%">
Year:
</TD><TD width="80%">1980 to 1980
</TD></TR><TR><TD>
Make:
</TD><TD>
</TD></TR><TR><TD>
Length:
</TD><TD>20 to 21 feet
</TD></TR><TR><TD colSpan=2>
</TD></TR><TR><TD bgColor=#215563 colSpan=2>
</TD></TR><TR><TD colSpan=2>
</TD></TR><TR><TD>
Low:</TD><TD>
$850.00</TD></TR><TR><TD>
High:</TD><TD>
$9,850.00</TD></TR><TR><TD>
Average (mean):</TD><TD>
$5,350.00</TD></TR><TR><TD>
Median:</TD><TD>
$5,350.00
----------------------
Nada guide same boat
<TABLE borderColor=#000000 cellSpacing=0 cellPadding=0 border=0><TBODY><TR bgColor=#00245d><TD class=mainnav align=right height=20>
$2,000 </TD><TD width=1 bgColor=#666666>
</TD><TD class=mainnav align=right height=20>
$2,410 </TD><TR bgColor=#e7ebf1><TD colSpan=8> </TD></TR></TBODY></TABLE>
purty hefty difference. Even if most of those boats are overpriced.
</TD></TR></TBODY></TABLE>