You can purchase 5L for just over £30 from lots of websites…
https://apcpure.com/product/isopropyl-alcohol-99-9-acs
Really doesn’t seem like you’re just trying to “help other folk out”. You may have even stocked up before the pandemic in the hopes of price gouging. I’d understand buying it if you actually had plans to use it, but considering your selling 150L of it…