Marketplace Bug Testing

I need thorough testing for my online marketplace, www.blacktownmarkets.com.au.

Key tasks:
- Creating an account (priority)
- Creating an item for sale
- Buying an item (test card provided)

Requirements:
- Test on both desktop and mobile (Android & iOS if possible)
- Cover as many browsers as possible (Chrome, Safari, Firefox)

Ideal skills:
- Experience in web and mobile app testing
- Familiarity with multiple browsers and platforms
- Attention to detail and thorough reporting

Looking forward to your bids!