The Trek 730 multitrack has frame geometry very similar to the Trek 520. The 730 is not double butted, so it is a bit heavier than the 520.
A basic unmodified 730 can be had for less than $150- in fair ride able condition in the Bay Area. Someone has spent well over $500 on components to modify the bike being offered. Though I question "Shimano cartridge rear road-gearing hub" because Shimano has never made a hub with cartridge bearings....
The fenders look hokey to me; looks like a front fender on the back, and a shortened rear fender on the front. The gap in the back is not so good. The front is great.
Test ride it. Does it fit you?
Touring vs Road geometry - touring is more relaxed, more stable, like a hybrid.