Ooh I understand the time crunch, especially when going back to work! Honestly, a few of us tried the wearable pumps and they're game-changers for convenience, tapi preloved ones can be tricky since you really need to know the condition of the valves and membranes, if those parts are worn out, suction won't be the same and it's frustrating. Have you checked Carousell or Shopee Penang groups? Sometimes mummies there sell recent ones at decent prices, but I'd really recommend asking the seller detailed questions about usage and getting pics of the parts. Another option is to check if any of the rental services in Penang have wearable pumps available since that might be cheaper than buying preloved if you're unsure about long-term use.