The search for Hiblow

For the past week, have been doing online research for shops that sells Hiblow air pump in Singapore. So far, these are the ones:

1) Clementi Flourist and Aquarium (C328) --- Hiblow HP20 ($168)
2) Bangkit Marketplace fish shop --- Hiblow HP20 ($188), Hiblow HP40 ($200)
3) Petmart --- Hiblow HP20 ($150), Hiblow HP40 (200)
4) 2nd hand Hiblow from forums --- HP20 ($80-$120), HP40 ($100+)

Considering to get it from C328, if cannot then from Bangkit, dun think will be getting 2nd hand ones because user claims to be in good condition although used for ~1yr and need to self-collect at hougang... rather pay abit more for a brand new one.