Hello!
Judging by the job description, what you need is a parser to gather all information from your suppliers and keep the database updated with the correct product prices. If I understood it right, please consider I've been working with bash script, PHP and enterprise databases for more than 12 years now, so I'm perfectly able to do this job with the stability and quality it deserves.
If your suppliers send the prices updates via e-mail in a non-standardized format, it would be advisable that they could have a private login on your site, for example, in order to send this information. This would reduce error typing and ease database integration. But this can be a future work. By now, I can work on the e-mails and develop a script which parses the data and deploy it to the database.
Please keep in touch so we can discuss the details. By bid was the lowest possible, considering this can become a long-term partnership.
Best wishes.
Alex.