my daughter purchased a 2nd hand blower and paid via paypal - when it arrived it was not as described , which was hardly used with no marks - and this was not the case, and paypal resolved quickly for her
I also have had a few tools sent damaged and usually negotiated either a discount of some substance 15% ish OR had a gift card of significant value to purchase from the same supplier
As mentioned the toolbox will gret damaged in use, so perhaps £50 off as mentioned would be a win all round, unless the chip allows water in and then rust
£5 in £250 is not on , 2%, I have often been able to negotiate 10% when buying.
good luck
Nice tool box by the way
I have seen good reviews on Milwaukee tools and recently purchased their tape measure at a trade show recently and its used now all the time