so my girlfriend recently purchased a trek 520 on craigslist, and i am in the market for a decent touring bike so that we can travel the California coast together in the next year, initial budget is around $600ish (give or take)

i found this bike on craigslist that uses a 730 frame that has been converted into a touring bike but i dont really understand fully the difference between the geometry of a road bike compared to that of a hybrid
but i feel like he is asking a bit to much for the bike
though admittedly it seems like he has put alot of time and money into the bike
here is a link and picture
90s Trek 730 Built for Touring

he wants $600 for it
-Shimano Tiagra STI integrated shifters/brakes w/cable adjusters
-Crosstop Brake Levers
-Front fork has braze-on posts for added front rack support
-Shimano Tiagra Tri-Crankset
-9-Speed Shimano cartridge rear road-gearing hub
-Shimano Cantilever Brakes
-Touring kickstand
-700-35c tire in the front, 700-38c tire in the rear


id appreciate some feedback
is this a rip off?
is the 730 frame even well suited for touring?
whats the main difference between road geometry and hybrid geometry?

i will mainly use the bike as a commuter (20 miles a day) but would like it to handle some light touring along side my girls 520