Bender has a minor issue when you disable the PRICE field in only some categories, for example, in Personals. See the attachment for details of how it displays. It only removed the text box but it leaves the label.
To fix this, go to item_post.php and find these lines
<?php if( osc_price_enabled_at_items() ) { ?>
<div class="control-group">
<label class="control-label" for="price"><?php _e('Price', 'bender'); ?></label>
<div class="controls">
<?php ItemForm::price_input_text(); ?>
<?php ItemForm::currency_select(); ?>
</div>
</div>
Replace the code with this:
<?php if( osc_price_enabled_at_items() ) { ?>
<div class="control-group">
<label class="control-label" for="price"><?php _e('Price', 'bender'); ?></label>
<p class="controls">
<?php ItemForm::price_input_text(); ?></p>
<p class="controls"> <?php ItemForm::currency_select(); ?></p>
</div>