Have a look at Vend and Xero. Both are great products and fully integrate. Vend is specifically developed for retail. Only issue is the cost. Minimum monthly costs will be in the region of R1500 per month for both products.
P.S. No POS worthwhile integrates well with Sage One. If you really need...
Vend integrates with shopify for eCommerce. Also allows for photos of products. Its a good POS with great integration with Xero if needing an accounting system.
https://www.vendhq.com/
based on my experience and usage, HumbleTill might work for you. I have a post about it on this forum. Its not perfect but it does the basics well. Its cloud based which is another + factor (https://www.humbletill.com/pricing/)
Next year I will be moving to Vend for POS and Xero for Accounting...
Is there anyone using Humble Till in a retail environment? I have been using it for a month or so and it falls short for retail in my opinion. It is very good at processing basic POS activities and seems to be aimed at the hospitality/restaurant industry.
The tool really struggles with account...