that's a great price .. and a cheap way for someone to get into kegging.
some tip for extinguisher buyers ....
1. a sound working extinguiher may leak around its valve.. and if it does, there is little you can do. I've tried 4 .. 2 leaked .. 2 were fine.
2. when you remove the nozzle from the extinguisher .. some will have the right fitting to directly fit your regulator .. others won't ... If you need to buy fittings to adapt make sure you get high pressure rated fittings.
given that 3,5kg of CO2 will cost you about that much ... it's a steal .....
I suggest to anyone who already has a CO2 bottle to buy an extinguisher as a back-up to tie you over when ur bottle is empty until you can refill.
It takes me about 2 working day to get my bottle refilled ... sometimes 3 ... if I run out of a Friday night .. i'd be down for up to 5 days ..... my CO2 extinguishers are life savers .. I can take my time to refill, and never stress about getting low on my main bottle.