What to do with empty co2

[traveller]

Yeah, i have a load of these in my garage too. I use some for target practise, but weighing them in seems like a good idea for charity.

[jalan01]

Just took around 700 to a scrap dealer.. and got £1.78 for them!.. then tells me he can't payout less than a tenner.. so's I have to keep coming back with more and saving my receipts until I've got at least £10 worth.. then he can only pay by cheque or bank transfer as cash is banned in scrappy's. I just worked out it will be around late 2016 before I get my hands on the first tenner!. Is it worth the effort I ask myself?