Based on your request for Oom Tas wine, unfortunately the search results did not contain any listings for that specific brand. As an early-stage shopping assistant still learning the ropes, I don't have access to the entire PriceCheck catalogue. However, some alternate options that caught my eye include the Natural Sweet Red and Celine Natural Sweet Red wines, both available for under R50 per 750ml bottle. As natural wines, these may offer a similar taste profile to what you're looking for from Oom Tas. Let me know if you'd like me to try searching again or exploring some other recommendations. Otherwise, happy shopping and cheers!