Hello, I'm Thang from Vietnam, I have very good reviews on freelancer and i have 7 years experience in PHP, CSS, HTML, XML, AJAX, programming. And many platforms such as Creloaded, Oscommerce, Prestashop, Yii, Joomla, Wordpress, Ossclass, PhpFox, Opencart, Cs-cart, X-cart, CubeCart...
I checked your attach files and i understood what you want. I will fix the 500 error in the offer and ensure i add an option to product admin page so you can hide the price and say "In store purchase only".
Contact me, i will give you the best service.
Looking forward to working with you.
Thank you and best regards.
Thang