Dear Sir,
According to your request, I am able to build such an online store and implement all the features mentioned by you. But it will not cost 250 USD. Nice online store will cost minimum 500USD.
As for me, I am professional Web Developer, having 10- year experience in Web- and E-commerce development. My specialization is LAMP (Linux, Apache, MySQL, PHP), Magento Commerce, osCommerce, Drupal, Wordpress, Joomla etc. Expert in HTML5, CSS3, Javascript (JQuery, Prototype).
You can contact me anytime to discuss project.
Thanks and regards, Alex.