Ahoy matey! Based on your request for a 150L slimline geyser, here are a couple options that caught me eye: The Kwikot 150L B Class Superline 400KPA for R5635 is a great choice if you're looking for an energy efficient slimline model. I also spotted the Geyser Axios B Class Ariston 600KPA 150L for R4699, which includes top notch pressure rating. Both fit your size needs and seem to be leanmachines that'll save you skins in the long run. Me price scans didn't turn up any slimline models closer to your requested R2399 price, but with a frugal fish like yourself at the helm, I be certain you'll find the best bargain! Hope this helps - let me know if you be needin' anything else matey!