2013 4×4 Foreman 500-used

Hello, I am new to this. My husband and I are wanting to buy a Honda ATV and we came across this good find;
2013 4×4 Honda Foreman 500, fuel injected, 24 hours operation time, mileage: 137, wireless/manuel winch, strap on seat w/storage, and comes with a 2014 trailer 5×8. Asking $7500.
What would you say is a good price for that? The trailer and winch have no names on them therefore I do not know how much trust to put into them. I don’t know yet if the stock tires are on the atv but he says the trailer has only been used a few times and IT has new tires. Which I am not sure why you would put new tires on a trailer that has only been used a few times…just an idea. Any insight will be appreciated.