Open file byu_link_form.php file in your template folder.
Find this line:
Code:
<td>Your Bid:</td>
<td align="right">$</td>
<td><input name="bid" class="buyforminp2" onchange=dodiv(); onkeypress="return chknum(event)" onkeyup=dodiv(); size=9 >.00</td>
Replace $ sign with this:
Code:
<?php echo("$currency");?>
Now it will show your currency sign that you set in your admin panel.
The code may be slightly different because my template is modified a lot but the point is the same