£40 for the most similar item I can find on Amazon.
https://www.amazon.co.uk/Product-Pro-Compactor-Household-Recycling/dp/B08DJCPDNS/ref=sr_1_5?crid=2AXADCE9RSHG7&dchild=1&keywords=trash+basher&qid=1616427234&sprefix=trash+basher%2Caps%2C146&sr=8-5
I do think some kind of air pressure is an option, probably better than water.
Not convinced this works as well as it says it does, anyone got it? I'm tempted to try it for research purposes.
Something to squash the contents of your recycling bin down. Maybe that you could fill with water to increase the weight and then easily take water out again?
I can't be alone in struggling to get two weeks worth of recycling squashed into a bin, especially with so much being delivered now and...