For Snap On box if it's not paid for they could claim you're in possession of stolen goods. But they'd also have to prove that and is it worth their while to fight that or go after the original guy who owes them the money to begin with. I'm surprised for the value that the serial number wouldn't also be stamped on it somewhere.
I in house finance cars for a living so I know a few things about repossessions since I do this almost weekly. What people dont understand is the lender does not own the property legally they just have a financial interest in it. For example if one of my customers hides the vehicle behind a gate I can not report it stolen because they are the owners of the vehicle. In that case I would have have to get a court ordered repossession and then hope the residents open the gate when we get there with law enforcement. Legally the debtor has more rights to the property then the creditor.
Another thing I deal with as a car dealer is the rent a tire businesses. My customers finance out wheels and tires then get the vehicle repossessed I will get contacted by the company or they will show up demanding the wheels off the vehicle and it just tell them to leave. Like SO tools and boxes these loans are with the debtor and cant be taken from other people. Cars are different since there is a title of ownership i have all kinds of stories of people selling my vehicles on FBM for bottom dollar because they were out for repo and they are trying to get down-payment money for another vehicle.
Now would a SO franchise repo a tool box that was sold to someone else? Possibly if they serviced that shop and found it. Would it be legal? No.
As a car dealer if I sell cars using outside financing the customer is required to make a certain amount of payments and if they dont i have to buy the vehicle back (recourse buy back). I wonder if SO financial has similar rules on franchise dealers if so many might not have the liquid cash to buy back something like a fully loaded 84" Epiq box and would be doing everything possible to recover it.
Bottom line you cant break the piece during a repo, if someone were to show up you just tell them to leave. If they don't leave its trespassing and you call the police. When the police show up they will tell them to leave and they need to handle it in court.