it wasn't very clear what exactly you want to do, but I hope this will help you.
In case it won't please try to describe it once again, or write an example..
This is insert_values.php file which inserts value into db. you need also admin.html
I don't know structure of your table so i've simplified this code..
*******admin.html
<form method=post action=insert_values.php>
<input type=text name=actual_price>ACTUAL PRICE
<input type=submit>
*******insert_values.php
<?
//connect to db
$server="g7";
$database="regionpress";
$user="root";
$pass="";
$link=mysql_connect($server, $user,$pass);
$link1=mysql_select_db($database);
//insert price into database
$SQL="insert into YOUR_TABLE values($actual_price)";
$result = @($SQL);
?>
next file is insert.php
this code will return all prices from your_table where price is between 2 numbers sent from your form
<?
//connect to db
$server="g7";
$database="regionpress";
$user="root";
$pass="";
$link=mysql_connect($server, $user,$pass);
$link1=mysql_select_db($database);
//insert price into database
$SQL="SELECT * FROM your_table WHERE price BETWEEN '$min_price' AND '$max_price'";
$result = @($SQL);
$num = mysql_NumRows($result1);
$i = 0;
while ($i<$num){
echo mysql_Result($result, $i, "price");
$i++;}
?>