Don't look for a worn brake pedal pad. Thats no indication of heavy use
or more miles. I just replaced the brake pedal pad on a 2005 Buick that
was coming apart.

No real way to tell how many miles are on the van.

Have a mechanic check it out. Maybe do a compression check too.

If it runs good & you feel comfortable buying it, but it.

Good Luck.

harryface

PS, a friend of mine had a 94 Dodge Ram Cargo van he put 620,000 miles
on before a telephone phone hit it back in 2001.