I should definitely get new tires, right?

[isotherm]

I am looking at a 2006 TM. It is in overall very nice condition, however the tires are original. The owner says:

• The tires have good tread and no weather cracking.
• The trailer was taken out 3-5 times each year, locally (within a metro area).
• Otherwise, it was kept in a climate controlled garage.

If I buy, I should have the tires replaced before towing 4 hours home on the highway... right? And the spare too?