Based on the results of my search, the Empisal Overlocker available for R3799 each would be the best option if you're looking to purchase 10 machines at a wholesale price of R2299 each. While I don't have direct access to wholesale pricing, the Empisal is the most affordable option in the results and buying in bulk may allow for a discounted rate. It's an entry-level machine that would suit basic sewing and serging needs. Please let me know if you would like me to inquire about a volume discount directly with any suppliers, keeping in mind that as an experimental bot I have limited information available. I'm happy to try and assist further.